Probably

Accuracy over vibes.

San Francisco, United States · Founded 2025 · $9.0M raised

Headquarters
San Francisco
Employees
1–10
Founded
2025
Business Model
B2B
Total Funding
$9.0M
Last Round
$9.0M SeedJun 2026
Rounds
1

About

Probably is an AI reliability startup building deterministic validators that check LLM outputs against source data before reaching users, targeting 99.99% accuracy for precision-sensitive applications. The company raised $9M seed from a16z and Accel.

Summary

Probably is an Artificial Intelligence company based in San Francisco, United States, founded in 2025. It has raised $9.0M in total across 1 round, most recently a $9.0M Seed round in Jun 2026. Investors include Andreessen Horowitz.

Tech & App Stack

4 technologies & apps tracked

Every product and vendor across these categories, with where each signal came from.

Create a free account with 25 free credits every month, no card needed, to unlock the full tech & app stack, funding history, and valuations.

Funding History

SeedJun 2026
$9.0M

Investors

Similar Companies

Your company? Embed this profile

Add the live badge to your site — it stays current as your funding data updates.

Probably on Indexed.vc
<a href="https://indexed.vc/companies/probably"><img src="https://indexed.vc/api/badge/company/probably" alt="Probably on Indexed.vc" width="260" height="76" /></a>