Making stuff @ Greptile | Stanford Symbolic Systems 2020
Joined August 2020
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Ben Backus retweeted
when i joined at the beginning of 2026, i could not have predicted how much i'd come to love this team and this company. i also could not have predicted just how fast we would grow.
yet somehow, we are still so early. many more surprises in the pipeline. stay tuned :)
Greptile has raised a $50M Series B led by Menlo Ventures. The round values the company at $750M.
Greptile reviews and tests more than 1% of all PRs opened on GitHub every day. Thousands of engineering teams including Nvidia, Coinbase, Decagon, and Vanta use Greptile as their independent and central validation layer.
Fewer than 50 people, we are a small, talent-dense team of engineers and researchers in a quiet corner of San Francisco. If you’re interested in joining us, we’d love to hear from you.
Ben Backus retweeted
Today we’re releasing new Greptile review tiers: Plus and Apex.
Higher tiers have more tools and subagents, can run tasks in parallel, better understand the PR, and catch more bugs.
- Base: Thorough code review with full codebase context.
- Plus: A deeper review for PRs that need extra scrutiny.
- Apex: Our most intensive review for large, complex PRs.
Ben Backus retweeted
Introducing the Knowledge Base MCP.
Greptile maintains a detailed knowledge base of how every part of your codebase works, as well as a history of past incidents.
Starting today coding agents like Codex, Claude can access the Knowledge Base via Greptile's MCP, so they can use Greptile's learnings to write better code.
Ben Backus retweeted
you're graph engineering? lol, you're cooked. I'm hypergraph engineering. nah, that's too normie. I'm ubergraph engineering. the hypergraphers could never understand my genius. actually, ubergraphs are so last week. I'm high-dimensional topology engineering. if your agent workflows aren't on a calabi-yau manifold, you're doomed for the permanent underclass
Ben Backus retweeted
@greptile has one of the best teams out there. They are super responsive, love feedback, and build at an incredible speed. Greptile v5 just came out, and with TRex, it creates one of the best AI code review tools. @dakshgup @vaishaaant @soohoonchoi are the homies.
Ben Backus retweeted
getting reviews to be faster+better for the same price was our goal for v5. your software factories throughput should double now.
Ben Backus retweeted
I asked the founders if I could say which company this is, and they said ok. It's Greptile, which incidentally also has one of my favorite names of any YC co.
Ben Backus retweeted
boris cherny goes on a podcast every three months and says something like “i’ve stopped breathing now i just wrote a breath.md” and the next day everyone in sf stops breathing
Ben Backus retweeted
@nathanwangliao This slide (and others) from the @greptile folks at @aiDotEngineer SG certainly makes Devin look good haha
Ben Backus retweeted
launching 5 things:
1. multi-repo context support
2. rebuilt web app for super large orgs
3. integrations with claude/codex/devin
4. .greptile/rules files
5. rebuilt learning so greptile maintains internal docs about your company
Ben Backus retweeted
looking back at old 100k+ LOC projects that I wrote with my bare hands back in my prime
Ben Backus retweeted
"not this fucking problem again" --claude internally probably
In fact, NLAs suggest Claude suspects it’s being tested across many of our evaluations, even when it doesn’t verbalize its suspicions.
ALT We detect NLA-measured awareness on evaluation transcripts even when verbalized awareness is near-zero. We detect NLA-measured awareness on less than 1% of real Claude.ai transcripts from users that opted-in for their data to be used for training.
Ben Backus retweeted
more than a quarter of all code reviewed by greptile is now written by "background agents" - completely autonomous e2e coding agents like devin.
we analyzed millions of PRs written by background agents and compared their
- code churn rates
- revert rates
- bugs per PR
against human baseline.
read the full post on our blog!
Ben Backus retweeted
I consulted Dante's inferno and generating infographics with AI is, in fact, not in one of the nine circles of hell
Ben Backus retweeted
What if there were one day every year when we all took a break from fighting each other on Twitter, and worked together on repealing the Jones Act to remind ourselves of our shared humanity and common goals?
