Companies330 Funding$40.1B Rounds110 ▲5 mo Investors77 Eng roles3943 ● data fresh
VIX The Intelligent Venture Terminal beta

Callosum

fresh

Callosum

☆ Watch
fresh · evidence today 5 sources no confidence data
62.3/100
Venture signal
scored above 97% of pre-seed peers
Outlook Stable
Why this score? ↓
Funding
$100M
2026-08-20
Adoption
no signal
downloads / week
Developer
not scored
momentum / 100
Hiring
no board
eng openings

Traction

Current round

Opportunity & risk

↗ Strongest signal: funding_recency (19% of the score).

3 independent sources 0 promoted signals inspect the evidence →

Evaluation

How it's evaluated Four independent layers ▾

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

Platform score derived
62/100
Founder self-assessment claimed
4/100
Investor ratings opinion
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Expert ratings opinion
—
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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 No signals collected yet ▾
No team & hiring data yet. This category is part of the record and will populate as evidence is collected or the founder provides it.
Market & funding stage 1 of 3 signals present ▾
Funding stage
not provided
Lifecycle stage
not provided
Latest round stage
seed observed
Timeline 1 events ▾
  1. 2026-08-20 seed · $100M

Evidence & scoring

Why this score? none_required ▾

VentureSignalScore 62.3/100 for callosum, composed from 2 of 4 components (index v0 cross-signal), discounted ×0.85 for 50% signal coverage

ComponentWeightNormalizedContribution
funding_recency 0.2 0.9337 0.1867
funding_magnitude 0.3 0.6 0.18

Evidence this score rests on

Capital timeline every dated signal, across tiers

  1. reported $100M reported (seed) ↗
  2. rumor After Callous Layoffs, Workers Are Done with the Full-Time Work ↗

Narrative vs. reality No SEC filing found for this round

Reported narrative · Tier 2
$100M seed
announced 2026-08-20 · 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.

Community chatter Hacker News · Tier 3 · unverified manip. risk low · 0.22

Gray-market attention, not quality. 50+ HN mentions (peak 558 points). Claim-shaped headlines are rumors until corroborated — a Tier-3 factual claim carries no evidentiary weight on its own. Risk drivers: heavy gray-market attention. ▲ 558 Ask HN: Why are some YC startups not posting salary ranges when law requires it? 2022-12-13 ↗

Raw observations 191 records ▾
AttributeValueKindSourceObservedStateConf.
common_name Callosum observed artifact ↗ 2026-08-28 normalized 0.90
community.hn.max_points 558 observed artifact ↗ 2026-08-28 normalized 0.20
community.hn.mentions 50 observed artifact ↗ 2026-08-28 normalized 0.20
community.hn.rumors [] observed artifact ↗ 2026-08-28 superseded 0.20
community.hn.rumors [{"url": "https://news.ycombinator.com/item?id=34692190", "title": "After Callous Layoffs, Workers Are Done with the Full-Time Work", "points": 186, "created_at": "2023-02-07", "evidence_type": "rumor observed artifact ↗ 2023-02-07 normalized 0.20
community.hn.top_story {"url": "https://news.ycombinator.com/item?id=33970189", "title": "Ask HN: Why are some YC startups not posting salary ranges when law requires it?", "points": 558, "created_at": "2022-12-13"} observed artifact ↗ 2022-12-13 superseded 0.20
community.hn.top_story {"url": "https://news.ycombinator.com/item?id=33970189", "title": "Ask HN: Why are some YC startups not posting salary ranges when law requires it?", "points": 558, "created_at": "2022-12-13"} observed artifact ↗ 2022-12-13 superseded 0.20
community.hn.top_story {"url": "https://news.ycombinator.com/item?id=33970189", "title": "Ask HN: Why are some YC startups not posting salary ranges when law requires it?", "points": 558, "created_at": "2022-12-13"} observed artifact ↗ 2022-12-13 normalized 0.20
funding.round.amount_usd 100000000 observed artifact ↗ 2026-08-20 normalized 0.90
funding.round.announced_on 2026-08-20 observed artifact ↗ 2026-08-20 normalized 0.90
funding.round.lead_investors [] observed artifact ↗ 2026-08-20 normalized 0.90
funding.round.source_url https://siliconangle.com/2026/08/20/ai-workload-optimization-startup-callosum-raises-100m/ observed artifact ↗ 2026-08-20 normalized 0.90
funding.round.stage seed observed artifact ↗ 2026-08-20 normalized 0.90
metric.venture.funding_amount_usd 100000000 derived calc 2026-08-28 derived 0.90
metric.venture.funding_recency_days 8.9148 derived calc 2026-08-28 superseded 0.90
metric.venture.funding_recency_days 8.9168 derived calc 2026-08-28 superseded 0.90
metric.venture.funding_recency_days 8.9211 derived calc 2026-08-28 superseded 0.90
metric.venture.funding_recency_days 8.9418 derived calc 2026-08-28 superseded 0.90
metric.venture.funding_recency_days 9.0128 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.1406 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.1408 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.2121 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.2835 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.3724 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.4444 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.5314 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.6028 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.6744 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.7459 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.8175 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.8891 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 9.961 derived calc 2026-08-29 superseded 0.90
metric.venture.funding_recency_days 10.0345 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.1069 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.2503 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.2505 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.3297 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.4018 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.4743 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.5465 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.6187 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.691 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.7634 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.8357 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.9081 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 10.981 derived calc 2026-08-30 superseded 0.90
metric.venture.funding_recency_days 11.0167 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.0893 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.1619 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.3194 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.3198 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.4056 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.4791 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.5522 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.6254 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.6988 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.772 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.8454 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.9191 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 11.9926 derived calc 2026-08-31 superseded 0.90
metric.venture.funding_recency_days 13.4664 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.4667 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.546 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.6198 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.6937 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.7676 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.8416 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.9158 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 13.9899 derived calc 2026-09-02 superseded 0.90
metric.venture.funding_recency_days 14.0641 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.1383 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.2124 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.2867 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.361 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.5246 derived calc 2026-09-03 superseded 0.90
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metric.venture.funding_recency_days 14.5992 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.6737 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.7481 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.8226 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.8972 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 14.9716 derived calc 2026-09-03 superseded 0.90
metric.venture.funding_recency_days 15.0462 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.1208 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.1954 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.2701 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.3448 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.4289 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.5064 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.6572 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.6574 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.733 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 15.8085 derived calc 2026-09-04 superseded 0.90
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metric.venture.funding_recency_days 15.9613 derived calc 2026-09-04 superseded 0.90
metric.venture.funding_recency_days 16.008 derived calc 2026-09-05 superseded 0.90
metric.venture.funding_recency_days 16.0816 derived calc 2026-09-05 superseded 0.90
metric.venture.funding_recency_days 16.1554 derived calc 2026-09-05 superseded 0.90
metric.venture.funding_recency_days 16.2291 derived calc 2026-09-05 superseded 0.90
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metric.venture.funding_recency_days 16.3821 derived calc 2026-09-05 superseded 0.90
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metric.venture.funding_recency_days 16.6907 derived calc 2026-09-05 superseded 0.90
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metric.venture.funding_recency_days 16.8385 derived calc 2026-09-05 superseded 0.90
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metric.venture.funding_recency_days 17.0601 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.134 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.2079 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.2822 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.3563 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.4381 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.5123 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.5866 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.7349 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.8094 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.8838 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 17.9582 derived calc 2026-09-06 superseded 0.90
metric.venture.funding_recency_days 18.0336 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.1081 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.1826 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.2572 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.3468 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.6342 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.7093 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.8591 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 18.9344 derived calc 2026-09-07 superseded 0.90
metric.venture.funding_recency_days 19.1256 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.2209 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.2961 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.3754 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.4514 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.5267 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 19.605 derived calc 2026-09-08 superseded 0.90
metric.venture.funding_recency_days 21.2919 derived calc 2026-09-10 superseded 0.90
metric.venture.funding_recency_days 21.632 derived calc 2026-09-10 superseded 0.90
metric.venture.funding_recency_days 21.7078 derived calc 2026-09-10 superseded 0.90
metric.venture.funding_recency_days 21.7836 derived calc 2026-09-10 superseded 0.90
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metric.venture.funding_recency_days 21.9351 derived calc 2026-09-10 superseded 0.90
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metric.venture.funding_recency_days 22.1627 derived calc 2026-09-11 superseded 0.90
metric.venture.funding_recency_days 22.2386 derived calc 2026-09-11 superseded 0.90
metric.venture.funding_recency_days 22.3198 derived calc 2026-09-11 superseded 0.90
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metric.venture.funding_recency_days 22.9356 derived calc 2026-09-11 superseded 0.90
metric.venture.funding_recency_days 23.0122 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.0884 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.1655 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.2421 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.3236 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.4003 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.4771 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.5652 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.6469 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.7263 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.8036 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.8807 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 23.9579 derived calc 2026-09-12 superseded 0.90
metric.venture.funding_recency_days 24.0352 derived calc 2026-09-13 superseded 0.90
metric.venture.funding_recency_days 24.1125 derived calc 2026-09-13 superseded 0.90
metric.venture.funding_recency_days 24.1896 derived calc 2026-09-13 superseded 0.90
metric.venture.funding_recency_days 24.268 derived calc 2026-09-13 superseded 0.90
metric.venture.funding_recency_days 24.3489 derived calc 2026-09-13 derived 0.90
score.venture_signal 63.8 derived calc 2026-08-28 superseded 0.60
score.venture_signal 63.7 derived calc 2026-08-29 superseded 0.60
score.venture_signal 63.6 derived calc 2026-08-30 superseded 0.60
score.venture_signal 63.5 derived calc 2026-08-31 superseded 0.60
score.venture_signal 63.3 derived calc 2026-09-02 superseded 0.60
score.venture_signal 63.2 derived calc 2026-09-03 superseded 0.60
score.venture_signal 63.1 derived calc 2026-09-04 superseded 0.60
score.venture_signal 63 derived calc 2026-09-05 superseded 0.60
score.venture_signal 62.9 derived calc 2026-09-06 superseded 0.60
score.venture_signal 62.8 derived calc 2026-09-07 superseded 0.60
score.venture_signal 62.6 derived calc 2026-09-10 superseded 0.60
score.venture_signal 62.5 derived calc 2026-09-11 superseded 0.60
score.venture_signal 62.4 derived calc 2026-09-12 superseded 0.60
score.venture_signal 62.3 derived calc 2026-09-13 derived 0.60