Software Development · head to head
Flagsmith vs DeepSource
Flagsmith
Software Development
Open-source feature flag and remote config platform
- From
- Free
- Rated
- -
DeepSource
Software Development
Automated code review and AI-powered code fixes for engineering teams.
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Flagsmith the Free plan supports only a single team member, limiting collaboration for small teams.; DeepSource open Source plan caps at 1,000 reviewed pull requests and 1,000 formatting runs per month.
- They diverge on capability: Flagsmith covers Feature flags, DeepSource covers Automated pull request review.
Where they differ
Only the attributes on which Flagsmith and DeepSource actually diverge.
| Attribute | Flagsmith | DeepSource |
|---|
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 Flagsmith
- Feature flags
- Segments
- A/B testing
- Scheduled flags
- SDKs
- SAML/SSO
Only in DeepSource
- Automated pull request review
- AI-powered autofix
- Automated code formatting
- Monorepo support
- API and webhooks
- Bring-your-own-key AI
What people use each for
The jobs each tool is most often brought in to do.
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
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
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
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.
Pricing, plan by plan
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
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
Which should you pick?
Choose Flagsmith if
- You need feature flags.
- You want to start without paying.
- You work on web, api.
- You also want segments.
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.
Questions people ask
- Is Flagsmith or DeepSource better?
- Neither clearly leads. Flagsmith starts at Free and DeepSource at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Flagsmith or DeepSource?
- Flagsmith starts at Free and DeepSource at Free.
- Does Flagsmith or DeepSource run on more platforms?
- Both run on web, api, so platform support will not decide this one for you.
- Can I use Flagsmith for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Flagsmith best used for?
- Flagsmith is most often used for gradual feature rollouts across environments, remote configuration without redeploying code, running a/b tests tied to feature flags, self-hosting feature flags for data residency requirements. Of those, gradual feature rollouts across environments and remote configuration without redeploying code are not what DeepSource is typically brought in for.
- What can Flagsmith do that DeepSource cannot?
- Flagsmith covers Feature flags, Segments, A/B testing, Scheduled flags. DeepSource covers Automated pull request review, AI-powered autofix, Automated code formatting, Monorepo support.
Answered from the vendors’ own pages
Flagsmith: 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: 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: 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: 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: 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: 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.
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