All companies172 Funding$53.5B Rounds139 ▼9 mo Investors151 Eng roles3603 ● updated 3m ago
VIX The Intelligent Venture Terminal beta

Sail Research

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Sail Research

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Sail is the most cost-efficient API for the best open-source models. Sail now has the best direct API pricing in the world for DeepSeek V4.1 Flash: 3.3x less for realtime, 6x less for async vs. other observed

Series A AI infra & dev tools fresh · evidence 2d ago 17 sources no confidence data

In: AI inference & serving

45/100
Venture signal
scored above 40% of early peers
Outlook Stable
Why this score? ↓

What is established three decisions, kept apart

  1. 1 Identity verified Yes

    Published in the index on >=2 sourced evidence families, including a funding source that names the company and its round at https://siliconangle.com/2026/06/25/sail-research-raises-80m-optimize-long-horizon-ai-agents/. Identity rests on that source, not on the name alone.

  2. 2 In the ranked index Yes

    The ranked index lists private AI companies with two or more independent sourced evidence families; its Early-stage view also leaves out rounds of $100M or more that no source assigns a stage. This profile is listed in the ranked index. It is a statement about evidence and mandate, and about nothing else.

  3. 3 Fit for a seed/Series-A sourcing buyer Qualified

    Institutional venture backing and a stage band inside seed..Series A are both evidenced below.

    Venture backing, as assessed: evidenced · Stage, as assessed: Series A

    • siliconangle.com ↗ — Series A led by Sequoia; earlier seed led by Kleiner Perkins; $80M total at $450M valuation.

    Assessed 2026-10-24 for seed/Series-A sourcing.

Funding
$80M
2026-06-25
Adoption
no signal
downloads / week
Developer
not scored
momentum / 100
Hiring
2
eng openings
Commercial
public pricing
homepage

Composite signal v0 13 ±14 · 3 components

Five evidence lanes (activity, capital, infra, hiring, ecosystem) as within-cohort percentiles, combined with evidence-breadth weights over the 60-company baseline cohort. The ± band widens with missing lanes — it measures what the score stands on. 0 signals in the last 60 days back this number.

New infrastructure surfaces

Subdomains appearing in public certificate-transparency logs — infrastructure standing up, dated at detection. Intent labels are deterministic (token map), not guessed.

internal.sailresearch.com 07-19 staging.sailresearch.com launch prep 07-16 dev.sailresearch.com 07-15 app.sailresearch.com product surface 06-15 beta.sailresearch.com launch prep 04-29 api.sailresearch.com product surface 04-28

Traction

Latest cited round

Opportunity & risk

↗ Strongest signal: funding_magnitude (8% of the score).

↓ Scored on 2 of 4 components — adoption, developer had no computable metric.

13 independent sources 0 promoted signals inspect the evidence →

The skeptic's read what this company has said, judged against what happened

8 claims on record 1 verified 0 contradicted 7 not evaluated

Not evaluated ≠ false — the deadline or the evidence hasn't arrived. A forecast with no target date cannot be graded and is counted as insufficient temporal evidence. Nothing here is editorial: every count is a ledger row you can open on the Proof page.

Evaluation

How it's evaluated 3 independent layers ▾

No single number decides. Layers can disagree — that's the point. New to this? →

Platform score derived
45/100
Investor ratings opinion
—
Expert ratings opinion
—
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VIX signals 6 hard signals across 1 source ▾

The platform's own early signals for this company — hard-to-fake observations. Where one was recorded before a raise, the gap is shown; that is an observation, not a prediction.

See the full track record →

Technology No signals collected yet ▾
No technology data yet. This category is part of the record and will populate as evidence is collected or the founder provides it.
Team & hiring 2 of 3 signals present ▾
Team size (reported)
not provided
Open eng roles
2 observed
Total open roles
8 observed
Market & funding stage 3 of 3 signals present ▾
Latest round stage (as stated)
series_a observed stale
Latest round amount
$80M observed stale
Latest round announced
2026-06-25 observed stale
Timeline 1 events ▾
  1. 2026-06-25 series_a · $80M · Led by Sequoia Capital

Evidence & scoring

Why this score? none_required ▾

VentureSignalScore 45/100 for sail-research, composed from 2 of 4 components (ai_infra formula), discounted ×0.775 for 25% signal coverage

ComponentWeightNormalizedContribution
funding_recency 0.1 0.611 0.0611
funding_magnitude 0.15 0.5612 0.0842

Evidence this score rests on

Narrative vs. reality No SEC filing found for this round

Reported narrative · Tier 2
$80M series a
announced 2026-06-25 · source ↗
Filed reality · Tier 0 · SEC
No SEC Form D on record.

An evidence gap, not proof of falsity: Form D is not always required (foreign offerings, certain exemptions) or may not be filed yet.

Financing events four different events, four different dates

A first sale, a filing, an amendment and a public announcement are not the same event, and one date may not stand in for another. Where the latest financing date cannot be established from what we hold, this says unknown rather than substituting a date we do have.

Latest established financing date
2026-06-25
Money moved on or after
2026-06-25
Total reported by
not established
Basis
reported round

A reported round dated 2026-06-25 by its own source.

Counterparty exposure shared-investor contagion

Companies coupled to this one by a shared investor — if a common backer pulls back or a fund hits trouble, the shock propagates across the set. More shared investors = tighter coupling.

Etched 1 shared sequoia-capital Flow Engineering 1 shared sequoia-capital Instinct 1 shared sequoia-capital Mecka AI 1 shared sequoia-capital Serval 1 shared sequoia-capital Trajectory 1 shared sequoia-capital TypeSafe AI 1 shared sequoia-capital
Raw observations 34 current records ▾

Showing the 34 current records. Full observation history — 838 superseded records →

AttributeValueKindSourceObservedStateConf.
ai.document.claims {"claims": [{"claim": "Sail Research raised $80 million in funding, with seed led by Sequoia and Series A led by Kleiner Perkins.", "quote": "We've raised $80M funding, with our seed led by Sequoia an observed artifact ↗ 2026-07-20 promoted 0.50
ai.technical.assessment {"council": {"dissent": false, "members": [{"agent": "technical_specialist", "domain": "technical", "signal": 0.3, "signal_source": "model"}, {"agent": "product_docs_specialist", "domain": "product_do derived council 2026-07-16 promoted 0.26
buyer_fit.assessment {"buyer": "seed/Series-A sourcing", "sources": [{"url": "https://siliconangle.com/2026/06/25/sail-research-raises-80m-optimize-long-horizon-ai-agents/", "what": "Series A led by Sequoia; earlier seed observed readiness 2026-11-13 normalized 0.90
buyer_fit.status qualified observed assessment 2026-10-24 normalized 0.90
common_name Sail Research observed artifact ↗ 2026-07-14 normalized 0.90
common_name Sail Research observed artifact ↗ 2026-07-14 normalized 0.60
common_name Sail Research observed curated 2026-07-16 normalized 0.95
community.hn.max_points 0 observed artifact ↗ 2026-10-08 normalized 0.20
community.hn.mentions 0 observed artifact ↗ 2026-10-08 normalized 0.20
community.hn.rumors [] observed artifact ↗ 2026-07-18 normalized 0.20
community.hn.top_story {} observed artifact ↗ 2026-10-08 normalized 0.20
description Sail is the most cost-efficient API for the best open-source models. Sail now has the best direct API pricing in the world for DeepSeek V4.1 Flash: 3.3x less for realtime, 6x less for async vs. other observed artifact ↗ 2026-10-08 normalized 0.70
domain www.sailresearch.com observed artifact ↗ 2026-07-14 normalized 0.95
funding.round.amount_usd 80000000 observed artifact ↗ 2026-07-14 normalized 0.90
funding.round.announced_on 2026-06-25 observed artifact ↗ 2026-07-14 normalized 0.90
funding.round.lead_investors ["Sequoia"] observed artifact ↗ 2026-11-11 normalized 0.90
funding.round.source_url https://siliconangle.com/2026/06/25/sail-research-raises-80m-optimize-long-horizon-ai-agents/ observed artifact ↗ 2026-07-14 normalized 0.90
funding.round.stage series_a observed artifact ↗ 2026-07-14 normalized 0.90
gate.accumulation {"outcome": "document_created", "obs_count": 17, "source_id": "01KXZM8ZY1FH153XQVAJS2FYGC", "trigger_path": "accumulation_gate", "collector_count": 4, "artifact_collector": "website_collector"} observed artifact ↗ 2026-07-20 normalized 0.60
identity.verification {"method": "Published in the index on >=2 sourced evidence families, including a funding source that names the company and its round at https://siliconangle.com/2026/06/25/sail-research-raises-80m-opt observed assessment 2026-10-24 normalized 0.90
index.ai_tie AI_ADJACENT observed classify 2026-07-25 derived 0.60
jobs.board_url https://www.sailresearch.com/careers observed page 2026-11-13 normalized 0.85
jobs.postings.engineering 2 observed page 2026-11-13 normalized 0.85
jobs.postings.observed {"url": "https://www.sailresearch.com/careers", "basis": "job_links", "method": "read automatically from the job links on the company's own careers page (two or more distinct titles required)", "title observed page 2026-11-13 normalized 0.85
jobs.postings.total 8 observed page 2026-11-13 normalized 0.85
metric.venture.funding_amount_usd 80000000 derived calc 2026-07-14 derived 0.90
metric.venture.funding_recency_days 142.0416 derived calc 2026-11-14 derived 0.90
score.venture_signal 45 derived calc 2026-11-13 derived 0.43
sector ai_infra derived calc 2026-11-06 normalized 0.75
signal.attributed_claims 8 observed intelligence.claims 2026-09-26 parsed 0.90
source.document.reference {"kind": "document", "title": "sail-research: Sail Research — Infrastructure for long-horizon agents", "source_id": "01KXZM8ZY1FH153XQVAJS2FYGC", "extract_ref": "artifact:sha256:8b50a42c8a9a0dfdf023ce observed artifact ↗ 2026-07-20 normalized 0.95
website_url https://www.sailresearch.com observed artifact ↗ 2026-07-14 normalized 0.90
website_url https://www.sailresearch.com observed artifact ↗ 2026-07-14 normalized 0.95
website.homepage.has_pricing_link true observed artifact ↗ 2026-07-14 normalized 0.80