Software · head to head
DeepSource vs LangSmith
DeepSource
Software
Automated code review and AI-powered code fixes for engineering teams.
- From
- Free
- Rated
- -
The short version
- Only DeepSource has a free tier, so it costs nothing to try first.
- Each has a real cost: DeepSource open Source plan caps at 1,000 reviewed pull requests and 1,000 formatting runs per month.; LangSmith usage beyond the included trace allotment is billed in LangChain Compute Units at $1.50 per LCU and Storage Units at $1.00 per LSU, an unfamiliar metering unit compared to flat per-seat pricing, as of August 2026.
Where they differ
Only the attributes on which DeepSource and LangSmith actually diverge.
| Attribute | DeepSource | LangSmith |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | freemium | subscription |
| Free tier | Yes | No |
| Platforms | web, api | Web |
Identical on both: user rating (Not yet rated), category (Unknown).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in DeepSource
- Automated pull request review
- AI-powered autofix
- Automated code formatting
- Monorepo support
- API and webhooks
- Bring-your-own-key AI
Only in LangSmith
Nothing recorded that DeepSource does not also cover.
What people use each for
The jobs each tool is most often brought in to do.
DeepSource
- Automating pull request code review for engineering teamsnot LangSmith
- Auto-fixing detected code issues with AInot LangSmith
- Enforcing code formatting standards automaticallynot LangSmith
- Scanning large monorepos for quality issuesnot LangSmith
- Running self-hosted AI review in regulated environmentsnot LangSmith
LangSmith
No use cases recorded yet. See the LangSmith review.
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
DeepSource
- Open Source plan caps at 1,000 reviewed pull requests and 1,000 formatting runs per month.
- AI Review beyond the included credit is billed per 10K lines of code, which can add unpredictable cost.
- Self-hosted deployment and BYOK AI are Enterprise-only features.
- Enterprise pricing is not published and requires contacting sales.
LangSmith
- Usage beyond the included trace allotment is billed in LangChain Compute Units at $1.50 per LCU and Storage Units at $1.00 per LSU, an unfamiliar metering unit compared to flat per-seat pricing, as of August 2026.
Pricing, plan by plan
DeepSource
Free- Open SourceFree
- Free for public repositories
- 1,000 pull requests reviewed/month
- 1,000 automated formatting runs/month
- Team$24/month
- Unlimited repositories and pull request reviews
- $100 annual AI Review credit per user
- Monorepo support
- Enterprise$undefined/month
- Self-hosted deployment
- Bring-your-own-key AI Review
- SSO
LangSmith
On requestNo published plan breakdown. See the LangSmith review.
Which should you pick?
Choose DeepSource if
- You need automated pull request review.
- You want to start without paying.
- You work on web, api.
- You also want ai-powered autofix.
Choose LangSmith if
Nothing in the data separates LangSmith from DeepSource on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is DeepSource or LangSmith better?
- Neither clearly leads. DeepSource starts at Free and LangSmith at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, DeepSource or LangSmith?
- DeepSource has a free tier; the other does not. Paid plans start at Free for DeepSource and On request for LangSmith.
- Does DeepSource or LangSmith run on more platforms?
- DeepSource runs on web, api. LangSmith runs on Web.
- Can I use DeepSource for free?
- Yes. DeepSource has a free tier, so you can try it without paying. LangSmith starts at On request.
- What is DeepSource best used for?
- DeepSource is most often used for automating pull request code review for engineering teams, auto-fixing detected code issues with ai, enforcing code formatting standards automatically, scanning large monorepos for quality issues. Of those, automating pull request code review for engineering teams and auto-fixing detected code issues with ai are not what LangSmith is typically brought in for.
- What can DeepSource do that LangSmith cannot?
- DeepSource covers Automated pull request review, AI-powered autofix, Automated code formatting, Monorepo support.
Answered from the vendors’ own pages
DeepSource: What does DeepSource cost?
The Open Source plan is free for public repos; Team is $24 per user/month billed yearly with a $100 annual AI Review credit; Enterprise is custom-priced with self-hosted options.
SourceDeepSource: Is there a free plan, and what are its limits?
Yes, the free Open Source plan covers public repositories with 1,000 pull requests reviewed per month and 1,000 automated formatting runs per month.
SourceDeepSource: How is AI Review usage metered?
Team plans include a $100 annual AI Review credit per user, with additional usage billed at Standard ($8/10K LOC) or Advanced ($15/10K LOC) tiers.
SourceDeepSource: Can I change or cancel my plan?
Yes, subscriptions can be downgraded or canceled at any time.
SourceRelated pages
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