Sixtyfour

Name: Sixtyfour
Brand: Sixtyfour

AI Native

We are engineers, designers, storytellers crafting exhibits to spark curiosity, transforming concepts into adventure.

Est 2025|Raised $500K|7 Ref Customers

LinkedIn 1K|Web traffic 8K|FTEs 12|HQ San Francisco, us

MarketsList Building & Enrichment Account Research Identity Resolution

Published Oct 15, 2026

01Common complaints

- Organizations primarily needing a classic outbound stack - Providers such as Apollo or ZoomInfo may be more appropriate for contact databases combined with sequencing/dialer/SDR workflow capabilities. - Organizations requiring independently verified investigative outputs - The FullPAC/Sixtyfour partnership materials explicitly state that outputs are compiled from public information and are not independently verified or warranted. For decisions that require contractually verified ground truth, human investigators or vendors that provide contractual warranties may be needed. - Organizations operating under heavy regulation requiring HIPAA/FISMA tailoring - Sixtyfour’s Terms of Service indicate the service is not tailored for industry-specific regulations such as HIPAA. - Organizations that cannot operationalize false positives - Identity resolution and risk signal products can produce mismatches; organizations without human review capacity or governance may face legal or reputational risk. - Organizations that require mature enterprise controls publicly documented - While SOC 2 Type II is referenced, other enterprise requirements (ISO 27001, detailed data residency, pen-test reporting) were not clearly documented in public sources accessed for this research. - Verification and warranty limitations - Public partner materials emphasize that reports are compiled from public information and are not independently verified or warranted. - Review scarcity and maturity signals - Lack of accessible reviews on major platforms (Gartner Peer Insights, TrustRadius, Capterra) makes it harder to validate support quality, accuracy, and ROI claims. - Compliance/program transparency gaps - SOC 2 Type II is referenced, but detailed public documentation for ISO certifications, data residency, penetration tests, and enterprise controls was not found in the accessible sources. - Potential roadmap uncertainty - Documentation notes at least one API deprecation (the "findings" field marked deprecated). This indicates ongoing change common for early-stage APIs but suggests buyers should plan for API churn.

02Why they buy

- Flexible research agent model with structured schemas - Official documentation describes defining custom struct fields to receive structured outputs rather than fixed enrichment fields. - Identity resolution starting from many identifiers - Documentation emphasizes starting from name/email/phone/username and mapping connected accounts. - Source-backed/cited outputs (positioning) - The product is positioned to provide outputs with citations to supporting sources. - Caveat - Some vendor benchmark claims appear in marketing/YC materials (for example, performance or speed comparisons). These claims were not independently validated in the sources accessed for this report and should be treated as vendor-provided until independent validation is available.

03Field reports

Note: Public, high-signal end-user reviews were limited in accessible sources. G2 had an alternatives page for Sixtyfour, but the direct reviews page was not reliably accessible in the research above. TrustRadius and Capterra searches did not surface a Sixtyfour product profile with reviews. - Review platforms (attempted) - Gartner Peer Insights - Attempted, but no Sixtyfour product review page was found/accessible in the research. (Gartner Peer Insights is often protected by anti-bot controls and may require manual access.) - G2 - A G2 "alternatives" page exists for Sixtyfour, positioning it under an AI SDRs/software category and listing competing products. The page implies Sixtyfour is compared in sales engagement contexts, but direct user-review content was not captured. - TrustRadius - No readily accessible TrustRadius product page for Sixtyfour was found in the searches executed. - Capterra - No readily accessible Capterra product page for Sixtyfour was found in the searches executed. - Community / social proof (direct vendor claims) - Y Combinator company profile lists "companies using us today" (vendor-provided statements inside the YC listing content): Cloaked, TRM Labs, Airwallex, Whatnot, Surge, Turing, Datacurve. - Vendor blog provides an anecdotal early-customer ROI narrative (first customer reportedly achieved a small initial revenue with relatively low internal costs), but this is vendor-authored and not independently verified. - Independent/press-style mention - A press release announced a distribution partnership between FullPAC and Sixtyfour for AI-generated candidate research and due diligence reports. The release includes an explicit disclaimer that neither Sixtyfour nor FullPAC independently verifies or warrants report accuracy/completeness. - Representative quotes (balanced) - From Sixtyfour’s YC profile (vendor-supplied content): - "Give us one identifier… and we deploy agents to recursively search the open web, dark web, social platforms, court records, and regulatory filings. Every signal is cross-referenced… Every data point cited." (vendor claim) - From the FullPAC partnership press release (limitation noted): - "Sixtyfour’s reports are compiled exclusively from publicly available information… for that customer’s review and independent verification; neither Sixtyfour nor FullPAC independently verifies or warrants the accuracy or completeness of any report." - Vendor-origin stories - Early-customer story (vendor blog) - Sixtyfour describes an early paid engagement to find niche leads (psychiatrists in specific geographies) where Apollo/ZoomInfo were described as weak for niche/local business data. The blog reports the customer generated a small amount of revenue with modest internal costs. - Critical evaluation: - Vendor-authored; no methodology, timeframe, or independent corroboration provided. - The metric appears to measure a narrow early project and may not generalize. - Partner/distribution case - FullPAC distribution partnership (vendor press release) - Use case: political campaign candidate research and OSINT/digital footprint reporting. - Claims: preliminary reports are reported as typically available within a short timeframe (per vendor/partner statement). - Critical evaluation: - The announcement includes a material limitation: outputs are not independently verified; customers must independently verify. - For regulated or reputationally sensitive decisions, this disclaimer is significant.

04Best fit

Ideal Customer Profile

- Company sizes - Likely best fit: - Mid-market to enterprise security/risk teams where the cost of missing a bad actor is high - Startups/scale-ups with technical teams that can integrate an API and build workflows - The LinkedIn "company size" label is not a reliable indicator of customer size; it suggests Sixtyfour is an early-stage company. - Industries - Fintech / payments / marketplaces (KYB/AML-like workflows) - Cybersecurity / fraud intelligence - Recruiting / talent intelligence - Political tech / campaign research (per FullPAC partnership) - Roles and personas - Decision makers: - Head of Trust & Safety, Fraud, AML/KYB - Security intelligence / threat intel lead - RevOps / GTM ops leader (if used for lead research) - Head of Recruiting / talent ops - End users: - Analysts performing investigations - Data engineers integrating enrichment/search APIs - Operations teams running workflows and exporting results - Pain points addressed - Manual research time (OSINT, due diligence) - Identity fragmentation across handles/emails/phones - Lack of coverage in traditional lead databases for niche entities - Qualification criteria (good fit) - The buyer requires source-backed results and can operationalize citations and human review. - The buyer can tolerate some uncertainty in automated outputs and is prepared to invest in QA and validation processes. - The buyer has workflows where incremental completeness is worth additional spend. - Deal disqualifiers (poor fit) - Organizations that require HIPAA-tailored compliance or other industry-specific contractual assurances. - Organizations that require fully verified, warrantied due diligence outputs; Sixtyfour and partners disclaim independent verification or warranty in press materials. - Organizations seeking a pure sales engagement suite with built-in sequencing, dialer, and SDR workflows.

05The pitch

What the product does (core value proposition in objective terms)

- Sixtyfour is a people and entity intelligence platform that provides AI "research agents" to investigate individuals and companies across many sources and return structured, source-backed results at scale. The company frames the offering as an "intelligence infrastructure" accessible via a web application and via API endpoints for enrichment, identity resolution, and search. - Core workflows described in official materials include: - People intelligence (profiles, connected accounts, contact details, risk signals) - Company intelligence (company enrichment, associated people) - Identity resolution starting from a range of identifiers (name/email/phone/username/company) - Threat-actor intelligence and OSINT-style research (including dark web/breach signals) - GTM intelligence (org charts, decision makers, niche account discovery)

Target market and market positioning

- Primary positioning: B2B teams that require high-completeness intelligence on people/entities and that prefer agentic research workflows rather than static databases. - Targeted functions per vendor and YC profile: - Trust & Safety / fraud / AML / KYB teams - Cybersecurity and threat intelligence - Due diligence / investment research - Recruiting/talent intelligence - GTM / sales intelligence for niche targets that typical lead databases may not cover

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