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About Factagora
What is Factagora?
Factagora is a fact verification API designed to be a trust layer for AI systems. It sits between your application and your LLM, vector DB, or RAG stack, and adds a verification step in a single call. One key, three endpoints: Fact Search, Fact Checker, and Evidence Finder.
Why use it?
Hallucinations are a real problem for businesses deploying AI. Factagora solves this by returning a confidence-scored verdict with exact sources, so you can cite where every claim comes from. It's built on a Temporal Knowledge Graph (TKG) that structures data into verifiable FactBlocks. No migration, no retraining—just one API call to ground your AI's output.
Who is it for?
Factagora is for developers, product teams, and enterprises building AI applications where accuracy matters—legal research (e.g., law firms), financial analysis, healthcare decision support, or any customer‑facing AI that must not hallucinate. It's not for hobby projects that don't need verification.
Real use cases
Korea's top 5 law firm (Shin & Kim LLC) used Factagora to transform legal research: 350,000 documents restructured into verifiable FactBlocks, saving lawyers time and enhancing trust in their AI services. Other use cases: verifying chatbot answers in real time, grounding RAG outputs with citations, and building internal knowledge assistants that require source-backed answers.
Key features
- Fact Search — Search verified sources and get ranked, cited results for any query.
- Fact Checker — Verify any claim against original sources with a confidence verdict.
- Evidence Finder — Surface supporting and opposing evidence, ranked by strength.
- Bearers Auth & OpenAPI Spec — Secure, developer-friendly API with structured JSON responses that works with any language.
- Real-Time Verification — Can verify AI answers in real time, grounding outputs before they're displayed.
- Proven at Scale — Used by top-tier law firms to structure 350k+ documents into verifiable FactBlocks.
- Credit-Based Pricing — Flexible plans with usage tracked per endpoint, from free tier to enterprise.
SaaSpartout Score
7.3
/10
Editorial score from our review methodology — not user ratings.
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Factagora Pricing
Factagora pricing: from $0/mo (free plan) / $0.01/credit PAYG. Billing model: Freemium.
For comparison: the median starting price in Analytics & Data is $39/month, measured across 274 tools we track. See the full SaaS Pricing Index →
Free
$0/month — 100 welcome credits (one‑time), no credit card required, 1 collection, upload up to 5 sources.
Pay As You Go
$0.01/credit — Pay only for what you use, cancel anytime.
Project
$30/month — 3,000 credits per month, higher rate limits, 5 collections, 100 sources.
Bootstrap
$100/month — 12,000 credits per month, price per credit $0.0083.
Startup
$220/month — 30,000 credits per month, price per credit $0.0073.
Growth
$500/month — 75,000 credits per month, price per credit $0.0067.
Enterprise
Custom pricing — Custom credits & agents, dedicated support, SLAs, custom integrations.
All plans start with a free trial in the Playground—no credit card required.
Frequently asked questions
What is Factagora?
Factagora is a fact verification API that grounds AI outputs in verified facts, evidence, and causal reasoning. It provides endpoints for fact search, fact checking, and evidence finding, returning confidence-scored verdicts with cited sources.
How much does Factagora cost?
Factagora has a free plan with 100 welcome credits (no credit card required), a Pay As You Go option at $0.01/credit, and monthly plans starting at $30/month for 3,000 credits. Enterprise plans are custom.
Is there a free trial?
Yes, you can start free in the Playground with 100 welcome credits—no credit card required. You can test the API before committing to a paid plan.
Who is Factagora best for?
Factagora is ideal for developers and businesses building AI applications where accuracy is critical—such as legal tech, financial analysis, healthcare, and customer-facing chatbots. It's not for hobby projects that don't need source-backed verification.
What are top alternatives to Factagora?
Alternatives include other fact-checking APIs, custom RAG implementations with citation tracking, or vector databases with verification layers. However, Factagora's combination of fact search, check, and evidence finding in one API is unique.
What is the key limitation of Factagora?
The free plan has limited credits (100 one-time), and paid plans are credit-based, which may be a consideration for high-volume usage. Advanced analytics like causality graphs and timeseries require additional credits.
