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Chatter (YC S23) — Dead simple LLM testing and iteration

Chatter is Postman for LLMs. Our platform helps companies and developers test their LLM models.

Chatter is a Y Combinator company in the Summer 2023 batch. Its directory entry describes it as: Dead simple LLM testing and iteration. The founders listed are Anish Agrawal (Founder), Kasyap Chakra (Founder) (Y Combinator directory entry, August 8, 2023).

6 more companies from YC Summer 2023 ↓

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Chatter

New accelerator entry · 2023-08-08 · the record

Summer 2023
batch
2
people
Early
stage
United States of America
region
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What the record says

BatchSummer 2023
Announced2023-08-08
StageEarly
StatusAcquired
Team size2
IndustryB2B
Sub-industryB2B
SectorsAIOps, Developer Tools, Generative AI, SaaS
RegionsUnited States of America, America / Canada
BasedPhiladelphia, PA, USA
HiringNo
Sitehttps://chatter.anish.xyz
Previously known asCram

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Also in YC Summer 2023

Same batch, B2B first.

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In their words

Chatter is Postman for LLMs. Our platform helps companies and developers test their LLM models. Iterate on prompts, run them across model families and evaluate them against test cases – all in one place. With collaboration features, engineers can design LLM chains while QA can write test cases.

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Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)

A Full Report on Chatter: verified, sourced, every claim cited, ready in a few minutes. See pricing.

What the Full Report on Chatter covers

  1. The Short Answer

  2. Which Company This Is

  3. What They Do, And How The Money Works

  4. Who Runs It, And How To Reach Them

  5. The Money: Funding, Valuation, Runway

  6. Who Pays Them, And Who They Are Up Against

  7. Warning Bells

  8. Sources

    1 cited source found

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Sourced from the company's Y Combinator directory entry.

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Chatter: Accepted into Y Combinator Summer 2023
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Permanent URL: https://mentionfox.com/funding/yc-chatter
Last updated 2026-10-20
Primary record: Y Combinator directory entry
Chatter (YC S23) — Dead simple LLM testing and iteration. MentionFox, 2026-10-20. https://mentionfox.com/funding/yc-chatter