Warmly,

[Acquired by HubSpot in 2026] Autonomous sales platform to auto-email…

warmly.ai

5.8ScoreYC lists it as acquired, so it is not ranked.

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Why it scores 5.8

Warmly,, an AI SDR from YC S20, scores 5.8 of 10. Data as of 3 Oct 2026.

The score adds four parts, each 0 to 10, by weight. Every point comes from public evidence. How scoring works ·

Proof 4 × 30% 1.2
Scale 8 × 30% 2.4
Momentum 5 × 25% 1.3
Autonomy 6 × 15% 0.9
= 5.8

Proof
Do customers use it? 30% of the score
4
Claims a customer result and a customer count.
- +2
  A customer result
  “Customers running it are converting 30% more inbound traffic.”
  Launch YC post · 29 Apr 2026
- +2
  A customer count
  “This is the power of an autonomous sales orchestration platform and we have 100+ paying customers who can back it up.”
  YC page
Not found: revenue or growth (+4), named customers (+3), work done at scale (+2)
Scale
Is there a real company behind it? 30% of the score
8
60 people, raised $11M.
- +6
  60 people on its YC page50 to 99 people
- +2
  Largest of 2 rounds: $11M (Series A)Warmly raises $11M Series A from FelicisSource · 19 Oct 2023
Momentum
Is it shipping and growing now? 25% of the score
5
Shows a recent launch and a new claim.
- +3
  Launched in the last 6 monthsWarmly - Always-On AI Sales Agent for Your WebsiteLaunch YC post · 29 Apr 2026
- +2
  A new traction claim
  “Customers running it are converting 30% more inbound traffic.”
  Launch YC post · 29 Apr 2026
Not found: open roles on YC (+2), funding news in the last year (+2), a batch in the last year (it is YC Summer 2020) (+1)
Autonomy
How much of the job does it do on its own? 15% of the score
6
Supervised agent: takes actions in other systems; a person approves key steps.
- +6
  Level 2 of 4: Supervised agentTakes actions in other systems; a person approves key steps.
What the model read
- Acts in other systems: 94% likely
- Finishes whole tasks: 30% likely
- Calls itself an agent: 89% likely
Level 2: Takes actions in other systems; a person approves key steps.

About Warmly,

Acquired by HubSpot in 2026.

Step 1: We find you warm leads: contacts + companies that are showing interest on your website (via 6sense/Clearbit) and researching you around the web (via Bombora) but haven't converted yet.

Step 2: We then auto follow up via chat, email or LinkedIn. Depends what workflows you want to set up - we can AI chat with them on your website, auto AI email them via your sequence provider of choice, and/or auto AI linkedin sequence them. Your humans can verify everything before being sent too.

Outcome: 10x more outbound than a human SDR, 3x reply rates since they're warm and more booked meetings (results shown in ROI dashboard).

P.S. if you want to use humans: you can send 1-click warm intro requests via your network or live chat/video call them too.

This is the power of an autonomous sales orchestration platform and we have 100+ paying customers who can back it up.