Specialized Search Engines & Research Databases
Find the right search engine for every research task
Explore academic search engines, medical and government databases, legal records, web archives and statistical data portals — each listed with its operator, access model and a clear “best for” note.
- 113 specialized resourcesAcademic, government, legal, archive and data sources
- 16 research categoriesOrganized by research task, not by brand
- 113 editorially reviewedDocumented desk reviews; others show “Not Yet Rated”
- Research guidesLearn how to search each source effectively
Editor’s Picks: Search Engines Worth Exploring
Discover search engines and specialized databases selected by AOFIRS for their research usefulness, source credibility, specialized coverage, and information-discovery capabilities. Each featured resource should help researchers find reliable information more efficiently.
How We Select Editor’s Picks
AOFIRS Editor’s Picks highlight search engines and research databases selected for their usefulness, relevance, credibility, specialized coverage, and information-discovery capabilities.
Selections are based on editorial assessment, not advertising placement or popularity alone.
Featured status does not guarantee the accuracy or completeness of information provided by third-party platforms.
Explore Search Engines & Databases
BASE (Bielefeld Academic Search Engine)
PDF Search EnginesAcademicSearch engine for academic web resources harvested from thousands of open repositories, run by Bielefeld University Library.
Best for: Searching open repositories worldwide
Bookboon
PDF Search EnginesPublisher of business and student textbooks offered through subscriptions and partners.
Best for: Business and educational ebooks
Free-eBooks.net
PDF Search EnginesEbook catalogue with free and premium membership downloads.
Best for: Author-supplied ebook discovery
FreeFullPDF
PDF Search EnginesSpecialist search for scientific PDFs, theses and patents gathered from open web sources.
Best for: Discovering scholarly PDF documents
Google Advanced Search
PDF Search EnginesGeneral Google web search with file-type, site and date filters; use filetype:pdf to find PDF documents.
Best for: Finding web PDFs with filetype:pdf
Libby
PDF Search EnginesOverDrive app for borrowing library ebooks and audiobooks with a library card.
Best for: Borrowing ebooks through a library
ManyBooks
PDF Search EnginesEbook catalogue of public-domain classics and independent titles.
Best for: Public-domain and independent ebooks
Obooko
PDF Search EnginesCatalogue of free ebooks published with author permission.
Best for: Free ebook catalog browsing
PDF Room
PDF Search EnginesSearch engine and catalog for free PDF books and documents, browsable by category.
Best for: Browsing and searching free PDF books by category
PDFSearch.org
PDF Search EnginesDedicated search engine for finding publicly available PDF books and documents on the web.
Best for: Finding PDF books and documents on the open web
ResearchGate
PDF Search EnginesResearch network where authors share papers and readers can request full texts.
Best for: Author-shared research and full-text requests
Science.gov
PDF Search EnginesAcademicA federated gateway to reports, publications, datasets, software, and other research results from participating federal agencies. Search returns links and records from source systems rather ...
Best for: Searching U.S. federally funded scientific and technical research across agencies
ScienceDirect
PDF Search EnginesElsevier platform with subscription and open-access journal articles and book chapters.
Best for: Publisher-hosted scholarly articles
Scribd
PDF Search EnginesSubscription platform for ebooks, audiobooks and user-uploaded documents.
Best for: Searching user-shared documents
Semantic Scholar
PDF Search EnginesAcademicFree, AI-powered research tool for scientific literature from the Allen Institute for AI, with paper summaries, citation context and an open API.
Best for: Exploring scientific literature quickly with AI summaries and citation context
WorldCat
PDF Search EnginesAcademicA union-catalog discovery service aggregating participating libraries’ holdings, with links to online content or local library catalogues. It helps users locate materials; it is not ...
Best for: Locating books, journals, articles, media and other materials across library collections and determining which libraries hold them.
AGRICOLA
AcademicGovernment-backed subject resource integrated into NAL SEARCH; selecting the AGRICOLA dataset targets the agricultural catalog. NAL says the former OpenAGRICOLA interface was retired, so direct ...
Best for: Agricultural science literature, USDA publications, and related bibliographic records.
arXiv
AcademicFree open-access repository of preprints in physics, mathematics, computer science, quantitative biology, statistics, economics and related fields, operated by Cornell University.
Best for: Finding the latest preprints in science and computing
CERN Document Server
AcademicCDS documents a broad structured search supporting metadata, full-text, and reference searching, useful for CERN-focused research and institutional records. Official terms state the service is ...
Best for: CERN research and institutional output, including publications, reports, multimedia, and historical material.
CORE
AcademicAggregator of open access research papers harvested from repositories and journals worldwide.
Best for: Finding free full-text research papers
Crossref Search
AcademicSearch tool for metadata registered with Crossref, the DOI registration agency for scholarly publications.
Best for: Finding and confirming DOIs and citation details
dblp
AcademicA focused, openly accessible bibliographic directory with distinct publication, author, and venue search and a documented API. Its own guidance notes API elements may change ...
Best for: Computer science publications, authors, journals, and conference proceedings.
Dimensions
AcademicLinked research-information platform with cross-search and analytical views that connect research outputs to funding and other research objects. Feature and content availability differs between free ...
Best for: Discovery across publications and datasets, with contextual links to grants, citations, patents, clinical trials and policy outputs; research landscape analysis.
DOAJ (Directory of Open Access Journals)
AcademicCommunity-curated directory of peer-reviewed open access journals and their articles.
Best for: Finding and vetting open access journals
EconBiz
AcademicA specialist economics/business portal combining multiple bibliographic resources, relevance/recency sorting, filters, thesaurus-supported topic searching, and access links. It can point to open materials or licensed ...
Best for: Economics and business studies literature discovery, including working papers, articles, events, and access options.
ERIC
AcademicUS Department of Education database of education research and information, sponsored by the Institute of Education Sciences.
Best for: Education research and reports
Europeana
AcademicCross-institutional cultural heritage discovery portal organized by themes, topics, periods and institutions. It is an interdisciplinary research resource for cultural and historical evidence, rather than ...
Best for: Primary-source and cultural-heritage discovery: digitized books, manuscripts, images, audiovisual material, objects and archival records from European institutions.
Google Scholar
AcademicFree Google search engine for scholarly literature, including articles, theses, books, abstracts and court opinions.
Best for: Finding scholarly papers and tracing who cites them
HathiTrust Digital Library
AcademicA large research digital library. Anyone can search, but access to reading and downloads depends on rights, location, and—in some cases—member-library affiliation. It is not ...
Best for: Searching digitized books and archival scholarly material; openly readable public-domain titles
JSTOR
AcademicDigital library of academic journals, books and primary sources from the nonprofit ITHAKA.
Best for: Humanities and social science journals and books
NASA ADS
AcademicA field-specific bibliographic system whose official help describes sophisticated query fields, filters, sorting, saved queries, and author/identifier search. Full text is not universally available and ...
Best for: Astronomy and astrophysics literature, with related physics, geophysics, and preprint discovery.
NASA NTRS
AcademicThe official repository covers NASA STI and supplies public metadata, document links, and documented search operators; NASA also describes an OpenAPI and public metadata downloads. ...
Best for: NASA-funded scientific and technical reports, articles, conference materials, patents, media, and related records.
Open Science Framework
AcademicOpen research infrastructure and discovery environment for project records, preregistrations, preprints, and links to research outputs stored in OSF or connected services. It is not ...
Best for: Finding and linking openly shared research projects, registrations, preprints, data, materials and code; managing reproducible collaborative research.
OpenAIRE Explore
AcademicSearch interface over an open scholarly knowledge graph aggregating and interlinking metadata from many trusted sources. Offers filters by output type and access, graph relationships, ...
Best for: Discovering and connecting publications, datasets, software, projects, funders, organizations and repositories, especially in open-science workflows.
OpenAlex
AcademicFree, open index of scholarly works, authors, institutions, sources and topics, with a public API and full data snapshots.
Best for: Open scholarly metadata and research analytics
OpenDOAR
AcademicA curated directory of repositories rather than a full-text host. Official materials describe editorial review of listed repositories and provide guidance on repository policies; availability ...
Best for: Locating and comparing open-access repositories worldwide
OSTI.GOV
AcademicThe official DOE discovery portal offers advanced search, filters, record-level metadata, API/download options, and a clearly described distinction between resource-available and citation-only records. Full text ...
Best for: DOE-funded science, technology, and engineering research outputs across publications, reports, datasets, software, patents, and more.
RePEc / IDEAS
AcademicIDEAS is a free interface to decentralized publisher-supplied RePEc metadata; it supports broad economics discovery and personalized MyIDEAS alerts/lists. Decentralized contribution and publisher-maintained metadata can ...
Best for: Economics working papers, journal articles, books, author profiles, and research series.
SciELO
AcademicA regional scholarly publishing and discovery network with an official advanced-search interface and explicit privacy documentation under Brazil’s LGPD. Open-access orientation is a major strength, ...
Best for: Open-access scholarly journals and articles, particularly from Latin America, the Caribbean, Spain, Portugal, and South Africa.
Scilit
AcademicScholarly publication aggregator that sources and merges metadata from multiple public and publisher platforms. Provides advanced Boolean/field search, related articles, rankings and alerts; it identifies ...
Best for: Fast, broad discovery across journal articles, books, chapters and preprints, including citation alerts and related-article suggestions.
SSRN
AcademicSSRN’s official support documentation says searching and discovery are free without an account and documents advanced search by title, author, keyword, or full text, plus ...
Best for: Working papers and preprints across social sciences, law, business, economics, and related fields.
The Lens
AcademicScholarly and patent discovery platform with structured filters and links between scholarly works and patent citations.
Best for: Cross-disciplinary scholarly discovery that connects papers with patents and innovation activity.
bioRxiv
MedicalLife-sciences preprint archive and distribution service. Submissions receive basic screening, but manuscripts are not peer-reviewed, edited or typeset before posting; versions and later journal publication ...
Best for: Rapid discovery of unpublished life-sciences research and tracking early findings, versions and emerging topics.
ClinicalTrials.gov
MedicalRegistry of privately and publicly funded clinical studies worldwide, run by the US National Library of Medicine.
Best for: Registered clinical trial status and results
Cochrane Library
MedicalHigh-quality systematic reviews for healthcare decisions, published by Cochrane.
Best for: Systematic reviews and evidence synthesis
Europe PMC
MedicalFree life-science literature database with abstracts, full-text articles, preprints and links to related data.
Best for: Biomedical research including full text and preprints
MedlinePlus
MedicalA health-information service for patients, families, and friends, with health topics, medical tests, genetics, medications, and links to selected sources. It provides education rather than ...
Best for: Understandable, curated consumer health information in English and Spanish
medRxiv
MedicalPreprint archive for complete but unpublished medical and health-sciences manuscripts. It provides rapid access to findings and revisions, with screening but no pre-publication peer review; ...
Best for: Early discovery of unpublished clinical, medical and related health-sciences research—provided users explicitly account for the unreviewed status.
PubMed
MedicalFree search engine from the US National Library of Medicine covering biomedical and life-science literature citations and abstracts.
Best for: Finding medical and life-science research
PubMed Central (PMC)
MedicalA public full-text archive, not a general-purpose web search engine. The collection includes journal articles, accepted manuscripts, and some preprints; inclusion should not be mistaken ...
Best for: Finding and reading archived biomedical and life-sciences research articles
WHO Global Index Medicus
MedicalA unified search interface aggregating records from WHO Regional Indexes Medicus, including AIM, IMEMR, IMSEAR, LILACS and WPRIM. Offers regionally sourced bibliographic and, where available, ...
Best for: Health and public-health evidence from and within low- and middle-income countries, particularly regional literature less visible in major international indexes.
Congress.gov
Government & Public RecordsOfficial source for bills, laws and congressional records, run by the Library of Congress.
Best for: US federal legislation and its status
Data.gov
Government & Public RecordsUS government portal for open datasets from federal agencies.
Best for: Finding US government open data
Espacenet
Government & Public RecordsEPO’s public patent-search interface provides worldwide patent-document access, classification searching, machine translation, and explanatory tools.
Best for: Worldwide patent-publication search, family and technical exploration, and contextual information about grant and in-force status.
Google Patents
Government & Public RecordsA searchable index of patent publications and selected non-patent technical literature, with translated text and advanced search features.
Best for: Broad patent-publication and prior-art discovery using keywords, fields, classifications, and chemistry search.
GovInfo
Government & Public RecordsThe GPO’s official information service disseminates federal government publications and offers API access to document content and metadata across collections.
Best for: Finding and retrieving official U.S. federal publications, including searchable documents, metadata, collections, and update feeds.
OpenSanctions
Government & Public RecordsA maintained aggregation and entity-resolution resource for sanctions, PEPs, and related risk datasets, with web search, matching/search/entity APIs, and downloadable bulk data.
Best for: Screening and researching sanctioned, politically exposed, and other risk-relevant people and organizations; API or bulk-data integration.
Regulations.gov
Government & Public RecordsA federal eRulemaking portal for searching regulatory materials and participating in comment processes. Agency and docket workflows determine what is available; submitted comments may be ...
Best for: Finding federal rulemaking dockets, notices, supporting documents, and public comments
WIPO PATENTSCOPE
Government & Public RecordsWIPO’s patent search service provides full-text published PCT applications, participating-office documents, and non-patent literature with search, translation, and patent-information tools.
Best for: Searching PCT international applications and participating national or regional patent collections, including multilingual and chemical queries.
archive.today
Document & Archive SearchWeb page archiving service that saves a snapshot of a page on demand.
Best for: Saving a quick snapshot of a page as evidence
Common Crawl
Document & Archive SearchOpen web-crawl corpus, downloadable archives, and URL indexes—not a public consumer search engine. Its index tools find crawl records and captured URLs; they do not ...
Best for: Researchers and developers building web-scale analyses, archives, or search systems from crawl data.
Digital Public Library of America (DPLA)
Document & Archive SearchAggregates metadata from partner cultural institutions and provides discovery, exhibitions, and primary-source sets; it does not itself hold every physical item or guarantee that all ...
Best for: Cross-collection discovery of digitized U.S. library, archive, and museum holdings
Internet Archive (digital library)
Document & Archive SearchA nonprofit digital library preserving and providing access to books and other digitized cultural artifacts; availability may be open, restricted, or lending-based depending on the ...
Best for: Accessing digitized books, texts, recordings, films, software, and other cultural-heritage holdings; this review concerns the library, not the Wayback Machine.
Wayback Machine
Document & Archive SearchInternet Archive service that stores and shows historical captures of web pages.
Best for: Seeing how a web page looked in the past
data.europa.eu
Data & StatisticsThe EU’s open-data discovery and reuse portal, succeeding the EU Open Data Portal and European Data Portal. It aggregates dataset metadata; the data and reuse ...
Best for: Discovering public datasets from EU, national, regional, local, and international portals
Eurostat
Data & StatisticsThe European Union’s statistical office provides a public data browser and REST APIs for statistical data and metadata in formats including SDMX, JSON-stat, and TSV.
Best for: Official European and EU-member-state statistics, structured dataset queries, and metadata discovery.
FRED (Federal Reserve Economic Data)
Data & StatisticsA large economic-data platform with charting, maps, downloadable series, and a documented API. Account features are optional and free according to official materials, but data ...
Best for: Finding, charting, and downloading U.S. and international economic and financial time series
Google Dataset Search
Data & StatisticsSearch engine from Google for finding datasets published across the web.
Best for: Finding datasets on any topic
OECD Data Explorer
Data & StatisticsThe OECD’s statistical data warehouse and discovery interface for official datasets, offering filters, downloads, and programmatic API access.
Best for: OECD and partner-economy official statistics, dataset exploration, downloads, and SDMX API retrieval.
Our World in Data
Data & StatisticsFree online publication of research and data on global issues, based at the University of Oxford.
Best for: Charts and data on global trends
UNdata
Data & StatisticsA unified portal of statistical datamarts with searchable tables, downloads, country profiles, and REST/SOAP SDMX API access.
Best for: Cross-topic discovery and download of international statistics compiled by UN and other international and national sources.
Wikidata Query Service
Data & StatisticsA public SPARQL endpoint and web GUI for querying Wikidata’s linked knowledge graph and returning structured results.
Best for: Ad hoc structured research and relationship discovery across Wikidata using SPARQL and a visual query interface.
World Bank Open Data
Data & StatisticsFree access to global development data from the World Bank.
Best for: Country-level development indicators
Brave Search
General & Alternative SearchIndependent web index with no user tracking, run by Brave Software.
Best for: Private web search on an independent index
DuckDuckGo
General & Alternative SearchPrivacy search engine that does not store search history.
Best for: Everyday private searching
Kagi
General & Alternative SearchIndependent, subscription-funded web search with personalization controls, search operators, and optional privacy-preserving Privacy Pass. Trial access is limited; continuing use is paid.
Best for: People seeking an ad-free, customizable general-purpose search engine and willing to pay for it.
Marginalia Search
General & Alternative SearchIndependent web search project with its own crawler/index and open-source search-engine software; it is not a specialized dark-web search service.
Best for: Curious users exploring smaller, independent, and less commercially prominent websites beyond mainstream ranking patterns.
Mojeek
General & Alternative SearchUK-based search engine with its own independent index since 2004.
Best for: Unpersonalized results from its own crawler
Qwant
General & Alternative SearchFree-to-use web search service with search-dependent advertising and privacy commitments described in its official policy and help center.
Best for: Users wanting a no-cost European general-purpose search engine with stated limits on profiling and behavioral advertising.
SearXNG
General & Alternative SearchMetasearchFree, open-source metasearch software that aggregates other search services. It is software, not one centrally operated search provider; public instance privacy depends on its operator, ...
Best for: Privacy-conscious users who can choose a trustworthy public instance or operate their own metasearch instance.
Startpage
General & Alternative SearchPrivacy search engine that serves Google results without logging or profiling users.
Best for: Google-quality results without tracking
Swisscows
General & Alternative SearchSwiss privacy search engine with its own partial index and a family-safe filter.
Best for: Family-safe private searching
BAILII
Legal ResearchBritish and Irish Legal Information Institute with free judgments and legislation.
Best for: UK and Irish case law and legislation
CourtListener
Legal ResearchMillions of legal opinions and the RECAP federal docket archive, run by Free Law Project.
Best for: US case law, oral arguments and PACER dockets
EUR-Lex
Legal ResearchOfficial access to European Union legal documents from the Publications Office of the EU.
Best for: EU law, treaties and case law
Justia
Legal ResearchFree legal information site with US federal and state cases, codes and regulations.
Best for: Free US case law, codes and regulations
WorldLII
Legal ResearchWorld Legal Information Institute linking free legal databases from many countries.
Best for: International and comparative law
Companies House
Business & FinancialOfficial UK register of companies with free filings, officers and persons with significant control.
Best for: UK company records, officers and filings
ICIJ Offshore Leaks Database
Business & FinancialDatabase from the International Consortium of Investigative Journalists covering offshore entities from major leak investigations.
Best for: Researching offshore companies and connections
OpenCorporates
Business & FinancialLarge open database of companies drawn from official company registers around the world.
Best for: Identifying companies and officers across countries
SEC EDGAR
Business & FinancialUS Securities and Exchange Commission system for searching public company filings.
Best for: Researching US public companies
SEDAR+
Business & FinancialOfficial Canadian system for securities filings and disclosure documents.
Best for: Canadian public-company filings
FamilySearch
People & IdentityFree genealogy platform with billions of historical records, run by a non-profit.
Best for: Genealogy and historical records
Find a Grave
People & IdentityCrowd-sourced database of graves and memorials worldwide.
Best for: Memorials and burial records
Whitepages
People & IdentityUS directory of people, phone numbers and addresses with paid background reports.
Best for: US phone and address directory
BuiltWith
Domain & WebsiteShows the technologies, analytics and hosting used by a website.
Best for: Website technology profiles
crt.sh
Domain & WebsiteSearch engine for TLS certificates recorded in public certificate transparency logs.
Best for: Certificate transparency logs
URLScan.io
Domain & WebsiteService that scans a URL and records requests, domains, screenshots and technologies.
Best for: Scanning and inspecting web pages
NASA Worldview
GeospatialNASA viewer for daily global satellite imagery and environmental layers.
Best for: Near-real-time satellite imagery
OpenStreetMap
GeospatialCollaborative open map of the world with searchable places and features.
Best for: Open map data and place search
USGS EarthExplorer
GeospatialUS Geological Survey portal for Landsat, aerial and elevation data.
Best for: Landsat and historical satellite imagery
Freesound
Image, Video & AudioCollaborative database of Creative Commons audio clips.
Best for: Creative Commons sound recordings
Openverse
Image, Video & AudioWordPress project that searches openly licensed images and audio.
Best for: Openly licensed images and audio
TinEye
Image, Video & AudioReverse image search engine that shows where an image appears online.
Best for: Tracing an image back to earlier copies
Wikimedia Commons
Image, Video & AudioMedia repository of over 100 million freely usable files.
Best for: Free-licensed photos, video and audio
Chronicling America
News, Blogs & CommunityLibrary of Congress database of digitized American newspapers from 1756 to 1963.
Best for: Historic US newspapers
CrowdView
News, Blogs & CommunitySearch engine focused on forums, Reddit and community discussions.
Best for: Forum and community discussions
Hacker News Search
News, Blogs & CommunityFull-text search of Hacker News stories and comments.
Best for: Technology discussions and launches
Trove
News, Blogs & CommunityNational Library of Australia search across newspapers, books, images and archives.
Best for: Australian newspapers and archives
Bluesky Search
Social MediaBuilt-in search of public posts and accounts on Bluesky.
Best for: Public Bluesky posts
Social Searcher
Social MediaSearches public posts and mentions across several social networks.
Best for: Public social media mentions
eTools.ch
MetasearchSwiss metasearch engine combining results from several sources without tracking.
Best for: Swiss privacy metasearch
MetaGer
MetasearchGerman non-profit metasearch engine with anonymous result opening.
Best for: Non-profit private metasearch
No resources match these filters.
What is a specialized search engine?
A specialized search engine focuses on one type of content or one subject — scholarly literature, clinical studies, legislation, company filings, archived web pages or official statistics. Its index, metadata and filters are designed for that content, so it often finds sources that general web search engines rank poorly or cannot reach because they sit inside databases.
Example: searching “metformin cardiovascular outcomes” in a general web search engine mixes news and health sites; the same query in PubMed returns indexed clinical literature you can filter by study type and date.
General vs specialized search engines
| Feature | General search engines | Specialized search engines |
|---|---|---|
| Content scope | The open web | One subject or content type |
| Source quality | Mixed; ranked by popularity signals | Curated or authoritative collections |
| Filters | Date, language, file type | Field-specific: study type, court, filing form, dataset |
| Best use | Orientation and general information | Professional, academic and investigative research |
| Examples | Google, Bing | Google Scholar, PubMed, SEC EDGAR, Wayback Machine |
Using AI search for research
AI answer engines can help you frame a question and discover terminology, but they summarize sources and can misstate them. Use them to orient, then confirm facts in a specialized database and cite the original source, not the AI answer.
Browse AI research tools →How AOFIRS reviews resources
Listings are checked against official documentation. Ratings are documented desk reviews scored on seven weighted criteria: usefulness 25%, reliability 20%, features 15%, ease of use 15%, transparency 10%, privacy 10%, value 5%. Defunct, parked and consumer-only sites are removed. Resources without a completed review show “Not Yet Rated”.
Read our editorial policy →Suggest a search engine or report an error
Know a specialized resource we should include, or spotted an outdated detail? Send the resource name, its official website and what should change. AOFIRS does not sell listings or rankings.
Submit a suggestion →How to choose the right search engine
Start from the research task: the type of source you need, who publishes it, and whether you need full text, metadata or raw data. Our guides walk through each research type step by step.
Read the guides →Frequently asked questions
What is a specialized search engine?
A specialized search engine indexes one type of content or one field — for example scholarly papers, court records, company filings, archived web pages or statistical datasets. Because its index and filters are built for that content, it usually returns more relevant, better-sourced results than a general web search engine for professional research tasks.
How is a search engine different from a research database?
A search engine crawls and indexes content from many sources. A research database holds a curated collection, often maintained by a single publisher or agency (PubMed, SEC EDGAR, ERIC). Many resources in this library are search interfaces to databases; each listing states its operator so you know where the data comes from.
Are AI answer engines the same as search engines?
No. AI answer engines such as Perplexity or ChatGPT search generate written answers from retrieved sources. They are useful for orientation, but you should open and check the cited sources. AOFIRS lists AI answer engines separately in the AI Tools section and does not classify every AI product as a search engine.
How does AOFIRS rate search engines?
Ratings are documented desk reviews based on each provider’s official documentation, scored on seven weighted criteria: usefulness 25%, reliability 20%, features 15%, ease of use 15%, transparency 10%, privacy 10% and value 5%. A resource shows “Not Yet Rated” until a review is completed.
Does AOFIRS accept payment for listings?
No. Listings and ratings are editorial. AOFIRS does not sell placement, and resources are not ranked by sponsorship.
How can I report an error or suggest a search engine?
Use the AOFIRS contact page. Include the resource name, its official website and what should change. Corrections are checked against the provider’s own documentation before the listing is updated.
