# Sixtyfour

> Sixtyfour builds AI research agents that investigate people and companies.
> Given a single identifier — an email, name, phone number, company or domain —
> the agents browse the open web, official records and unstructured sources,
> then resolve what they find into one profile in which every claim is cited
> back to the source it came from.

Sixtyfour AI Inc. is a San Francisco company, backed by Y Combinator. The
product is used by trust and safety, risk, fraud, compliance and
investigations teams, and is available as a platform and as a research API.

Key facts:

- On its own published benchmark (RECON), Sixtyfour High leads all 14 systems tested at 54.3% weighted accuracy.
- Findings are source-cited: every claim carries the record it came from.
- Coverage spans the open web, the dark web, official records and unstructured sources.
- SOC 2 compliant. Status at https://status.sixtyfour.ai
- Customers include Airwallex, Casco, Snorkel AI, Cloaked, TRM Labs, Gryphon Investors, Delphi, Datacurve, ZoomInfo, Turing and GOTV.

## Product

- [Sixtyfour — the identity intelligence platform](https://www.sixtyfour.ai/): what the product does, who uses it, and the five use cases it is built for — research API, trust and safety, investigations, workforce identity, and financial crime.
- [Book a demo](https://www.sixtyfour.ai/demo): request a walkthrough.
- [Trust and safety](https://www.sixtyfour.ai/solutions/trust-and-safety): screening sellers, hosts and merchants at onboarding and at volume, and detecting the rings operating behind them.
- [API documentation](https://docs.sixtyfour.ai/introduction): endpoints, authentication and response shapes.

## Research

- [RECON — a benchmark for people intelligence](https://www.sixtyfour.ai/recon-benchmark): HUD results on 514 human-verified fields for 140 people, updated September 7, 2026. Metrics are weighted accuracy, accuracy, precision and recall. Earlier p50 latencies are dated separately; they are not HUD timings.

RECON leaderboard, by weighted accuracy:

1. Sixtyfour High (High) — 54.3% weighted, 67.7% accuracy, 83.5% precision, 459s earlier p50 (June 2026, not HUD)
2. Sixtyfour Medium (Medium) — 44.7% weighted, 56.0% accuracy, 83.2% precision, 223s earlier p50 (June 2026, not HUD)
3. Parallel Ultra 2x (Parallel) — 41.1% weighted, 54.3% accuracy, 80.4% precision, 834s earlier p50 (June 2026, not HUD)
4. Parallel Ultra 8x (Parallel) — 37.5% weighted, 52.1% accuracy, 78.1% precision, 678s earlier p50 (June 2026, not HUD)
5. Grok 4.20-ma (xAI) — 36.2% weighted, 51.6% accuracy, 77.0% precision
6. Grok 4.6 (xAI) — 36.0% weighted, 50.8% accuracy, 77.4% precision
7. Grok 4.3 (xAI) — 30.9% weighted, 44.9% accuracy, 76.2% precision, 15s earlier p50 (June 2026, not HUD)
8. Sixtyfour Low (Low) — 28.8% weighted, 49.8% accuracy, 70.3% precision, 230s earlier p50 (June 2026, not HUD)
9. Parallel Ultra (Parallel) — 27.2% weighted, 43.4% accuracy, 72.9% precision, 589s earlier p50 (June 2026, not HUD)
10. Exa agent xhigh (Exa) — 23.9% weighted, 37.7% accuracy, 73.2% precision
11. GPT-5.6-sol xhigh (OpenAI) — 20.4% weighted, 31.3% accuracy, 74.2% precision
12. Gemini 3.1 Pro (high) (Google) — 13.4% weighted, 23.2% accuracy, 70.4% precision, 87s earlier p50 (June 2026, not HUD)
13. DeepSeek V4 Pro (high) (DeepSeek) — 9.3% weighted, 12.6% accuracy, 79.3% precision; counts inferred from rounded HUD scores
14. Claude Haiku 4.5 (Anthropic) — 1.6% weighted, 7.6% accuracy, 55.7% precision

## Writing

- [How We Use Agents for Reverse Username Search Investigations](https://www.sixtyfour.ai/blog/how-we-use-agents-for-reverse-username-search-investigations): Bad actors hide behind pixelated avatars and disposable handles. Here is how the chain unravels.
- [How We Use Agents for Identity Resolution on Banned Scammers](https://www.sixtyfour.ai/blog/how-we-use-agents-for-identity-resolution-on-banned-scammers): Device fingerprinting works on the bottom 90% of operators, but the top 10% rotate hardware before breakfast. Here is how to stop them.
- [How We Use Agents to Detect Rented Gig-Worker Accounts](https://www.sixtyfour.ai/blog/how-we-use-agents-to-detect-rented-gig-worker-accounts): A $65 Facebook transaction is all it takes to put an unvetted stranger behind the wheel. Here's how Sixtyfour closes that gap.
- [How We Trace Hidden Beneficial Owners Behind Shell Companies](https://www.sixtyfour.ai/blog/how-we-trace-hidden-beneficial-owners-behind-shell-companies): In 2024, TD Bank pleaded guilty to $18.3 trillion in unmonitored transaction activity tied to money laundering. Here is how agents trace the beneficial owners behind shell networks.
- [Case Study: How Mercor Uses Sixtyfour to Find AI Training Experts](https://www.sixtyfour.ai/blog/case-study-how-mercor-uses-sixtyfour-to-find-ai-training-experts): How Sixtyfour helps Mercor find rare experts who can generate training problems current AI models cannot solve.
- [Case Study: How Conduit Unlocked the STR Market with Sixtyfour](https://www.sixtyfour.ai/blog/case-study-how-conduit-unlocked-the-str-market-with-sixtyfour): How Sixtyfour helped Conduit identify fragmented short-term rental management companies that traditional data vendors could not reach.
- [Case Study: How Whatnot Discovered European TCG Sellers with Sixtyfour](https://www.sixtyfour.ai/blog/case-study-how-whatnot-discovered-european-tcg-sellers-with-sixtyfour): How Sixtyfour helped Whatnot identify qualified TCG sellers across the UK, Netherlands, and France for live auction commerce.
- [Sixtyfour AI is now backed by Y Combinator](https://www.sixtyfour.ai/blog/sixtyfour-ai-is-now-backed-by-y-combinator): Sixtyfour AI is joining Y Combinator’s first-ever spring batch as we go all in on building the best AI research platform in the world.

## Brand and reference

- [Brand guidelines](https://www.sixtyfour.ai/brand): logos, colour, type and usage rules, published for external use.
- [Design tokens, W3C DTCG JSON](https://www.sixtyfour.ai/brand/tokens.json): the colour, type and radius scales as data.
- [Design tokens, CSS custom properties](https://www.sixtyfour.ai/brand/tokens.css).
- [Terms of service](https://www.sixtyfour.ai/legal/terms-of-service).
- [Privacy policy](https://compliance.sixtyfour.ai/en/documents/privacy).

## Optional

- [Blog index](https://www.sixtyfour.ai/blog): all posts, filterable by category.
- [RSS feed](https://www.sixtyfour.ai/rss.xml).
- [Sitemap](https://www.sixtyfour.ai/sitemap.xml).
- [Careers](https://www.ycombinator.com/companies/sixtyfour/jobs).
- [GitHub](https://github.com/sixtyfour-ai).
- [LinkedIn](https://www.linkedin.com/company/sixtyfourai).
- [X](https://x.com/sixtyfourai).