Software Development · head to head
DeepSource vs Flagsmith
DeepSource
Software Development
Automated code review and AI-powered code fixes for engineering teams.
- From
- Free
- Rated
- -
Flagsmith
Software Development
Open-source feature flag and remote config platform
- From
- Free
- Rated
- -
The short version
- Each has a real cost: DeepSource open Source plan caps at 1,000 reviewed pull requests and 1,000 formatting runs per month.; Flagsmith the Free plan supports only a single team member, limiting collaboration for small teams.
- They diverge on capability: DeepSource covers Automated pull request review, Flagsmith covers Feature flags.
Where they differ
Only the attributes on which DeepSource and Flagsmith actually diverge.
| Attribute | DeepSource | Flagsmith |
|---|
Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), platforms (web, api), user rating (Not yet rated), category (Software Development).
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 Flagsmith
- Feature flags
- Segments
- A/B testing
- Scheduled flags
- SDKs
- SAML/SSO
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 Flagsmith
- Auto-fixing detected code issues with AInot Flagsmith
- Enforcing code formatting standards automaticallynot Flagsmith
- Scanning large monorepos for quality issuesnot Flagsmith
- Running self-hosted AI review in regulated environmentsnot Flagsmith
Flagsmith
- Gradual feature rollouts across environmentsnot DeepSource
- Remote configuration without redeploying codenot DeepSource
- Running A/B tests tied to feature flagsnot DeepSource
- Self-hosting feature flags for data residency requirementsnot DeepSource
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.
Flagsmith
- The Free plan supports only a single team member, limiting collaboration for small teams.
- Exceeding request limits triggers overage charges after a one-time 30-day grace period.
- Enterprise-grade SSO and governance are locked behind the Scale-Up and Enterprise tiers.
- Self-hosting requires operating and updating the platform yourself, unlike a fully managed SaaS competitor.
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
Flagsmith
Free- FreeFree
- Up to 50,000 requests/month
- 1 team member
- Unlimited feature flags, environments, identities and segments
- Start-Up$45/month
- Up to 1,000,000 requests/month
- 3 team members
- Scheduled flags, 2FA, A/B testing, integrations, email support
- Scale-Up$300/month
- 5,000,000+ requests/month
- 5-20 team members
- SAML/SSO, governance features, priority support
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 Flagsmith if
- You need feature flags.
- You want to start without paying.
- You work on web, api.
- You also want segments.
Questions people ask
- Is DeepSource or Flagsmith better?
- Neither clearly leads. DeepSource starts at Free and Flagsmith at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, DeepSource or Flagsmith?
- DeepSource starts at Free and Flagsmith at Free.
- Does DeepSource or Flagsmith run on more platforms?
- Both run on web, api, so platform support will not decide this one for you.
- Can I use DeepSource for free?
- Both have a free tier, so you can try either at no cost before committing.
- 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 Flagsmith is typically brought in for.
- What can DeepSource do that Flagsmith cannot?
- DeepSource covers Automated pull request review, AI-powered autofix, Automated code formatting, Monorepo support. Flagsmith covers Feature flags, Segments, A/B testing, Scheduled flags.
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.
SourceFlagsmith: What does Flagsmith cost?
Flagsmith has a Free plan, a Start-Up plan from $40-45/month, a Scale-Up plan from $250-300/month, and custom Enterprise pricing.
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.
SourceFlagsmith: Is there a free plan, and what are its limits?
The Free plan supports up to 50,000 requests per month and 1 team member, with unlimited feature flags, environments, identities and segments.
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.
SourceFlagsmith: How is usage metered?
Usage is metered by monthly API requests; exceeding a plan's limit triggers overage charges starting around $50 per million requests, with a 30-day grace period the first time a paid plan exceeds its limit.
SourceDeepSource: Can I change or cancel my plan?
Yes, subscriptions can be downgraded or canceled at any time.
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