Septim Flint vs. Greptile:
$29 one-time or $30/seat/month forever.
Same problem — AI-powered PR review. Completely different business models. Flint is 5 GitHub Actions you run in your own CI with your own Anthropic key. Greptile indexes your codebase on their servers and charges per-seat every month. Here’s the honest head-to-head.
Same category. Different thesis.
Septim Flint
Flint is a pack of 5 GitHub Actions workflows. You drop them into .github/workflows/ and they run Claude against your pull requests using an Anthropic API key you control.
- One-time purchase, lifetime updates
- Diff goes from your CI runner directly to Anthropic — not through us
- YAML files in your repo — auditable, reviewable, versionable
- No dashboard, no account, no vendor log-in
- No per-seat costs — your team shares one license
Greptile
Greptile is a hosted SaaS. You connect your GitHub org, it indexes your codebase on their servers, and it leaves AI review comments on your PRs with full cross-repo context.
- Codebase-wide semantic index (searchable, chat-able)
- Cross-repo context in review comments
- Historical PR analytics dashboard
- Slack integration for review summaries
- Managed service — no workflow files to maintain
What each tool actually does.
| Capability | Flint | Greptile |
|---|---|---|
| AI-generated PR review comments | Yes — via 5 workflows | Yes — via GitHub app |
| Code never leaves your environment | Yes — diff goes direct to Anthropic via your key | No — indexed on Greptile infrastructure |
| Cross-repo / full-codebase context | No — each PR reviewed in isolation | Yes — that’s the core feature |
| Pricing model | $29 one-time | $30/seat/month (~$360/seat/year) |
| Cost for a 10-dev team (year 1) | $29 | $3,600 |
| Cost for a 10-dev team (year 3) | $29 | $10,800 |
| Your API costs (Anthropic) | Yes — you pay Anthropic ~$0.10–$0.30 per PR | Included in seat price |
| Analytics dashboard | No | Yes |
| Slack integration | DIY via Action output | Built-in |
| Chat-with-codebase UI | No | Yes |
| SOC 2 / data governance review | Nothing to review — runs in your GitHub org | Requires vendor security review |
| Vendor lock-in | None — you own the workflow files | Subscription churn = losing reviews |
| Time to set up | 10 minutes (copy workflows, add API key secret) | 5 minutes (GitHub OAuth) |
| Team onboarding | Zero — it’s already in the repo | Invite each dev to the workspace |
What it costs in real dollars for a real team.
10-developer team · 3-year total cost of ownership
| Greptile · 10 seats × $30/mo × 36 months | $10,800 |
| Flint · $29 one-time | $29 |
| Flint · estimated Anthropic API spend (3 years, ~2,000 PRs @ ~$0.20) | ~$400 |
| Total TCO over 3 years — Greptile | $10,800 |
| Total TCO over 3 years — Flint + Anthropic | ~$429 |
| Difference | ~$10,371 saved with Flint |
* Greptile pricing based on public-facing retail rate as of April 2026. Enterprise deals may differ. Anthropic API cost is a rough estimate and varies with repo size and PR volume.
Neither tool is universally right.
Pick Flint when:
- You’re a solo dev or <25-person team
- You already have an Anthropic API key and want to own the bill
- You need "the diff never leaves our infrastructure" as a security answer
- You don’t want another SaaS subscription or vendor renewal
- You want the review criteria visible in your repo (YAML files) instead of in a vendor UI
- You’re planning for multi-year use and want a fixed cost
Pick Greptile when:
- You have 50+ developers and want a managed, no-maintenance option
- You genuinely need full-codebase context (Flint reviews one diff at a time)
- You want historical PR analytics out of the box
- Your team already lives in Slack and wants integrated review summaries
- You’re fine with indexing your code on vendor infrastructure after a security review
- You prefer a per-seat license cost over managing your own API key spend
// the honest take
Both tools solve a real problem. They solve it differently. If your team is small and you’re price-sensitive, Flint is overwhelmingly the better value — $29 covers unlimited reviews across unlimited devs, and your Anthropic key handles the compute cost transparently.
If your team is large and you need the full-codebase semantic index that Greptile indexes for you, Flint won’t match that (neither does any reasonable self-hosted tool at this price point). Flint is a diff-level reviewer. Greptile is a codebase-level reviewer. That’s the real difference.
Our honest advice: if you’re on the fence, start with Flint for $29. If a year from now your team is huge and you actually use the cross-repo analytics, upgrade to Greptile or a similar hosted product. The $29 you spent on Flint is $10,300 you kept out of a SaaS subscription in the meantime.
What buyers ask us.
Isn’t "own your API key" just shifting the cost to Anthropic?
Yes, that’s exactly what it is — and that’s why it’s cheaper. Anthropic charges you per token at cost; Greptile charges you per seat at retail markup. At any reasonable PR volume, the token cost is a tiny fraction of the per-seat price.
What if our PRs need cross-file context?
Flint workflows can include multiple files in the context window (up to your API-limit). You won’t get the full-codebase semantic search that Greptile provides, but you will catch most cross-file issues a reviewer would. For the gap, pair Flint with Drills skills run locally before the PR opens.
Can we still add Greptile later if Flint isn’t enough?
Yes. Flint is 5 YAML files in your repo; Greptile is a GitHub app. They don’t conflict. Some teams run both — Flint for basic checks, Greptile for codebase-wide review.
Do Flint reviews show up as PR comments?
Yes, posted as a bot comment via gh pr comment using a GitHub token you provide. Same surface area as Greptile’s output — the PR conversation thread.
What if Anthropic changes their API pricing?
Your Flint license keeps working. You adjust your rate-limiting config to match the new cost if needed. No vendor renegotiation, no SaaS price-hike email.
What’s the refund policy?
30 days, no questions. Email SeptimLabs@gmail.com with your Stripe receipt.
lifetime · private GitHub repo · 30-day refund · or bundle with Drills + Tether in the $59 Review Stack