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Software · head to head

Flagsmith vs Unleash

Flagsmith logo

Flagsmith

Software

Open-source feature flag and remote config platform

From
Free
Rated
-
Full reviewWebsite
Unleash logo

Unleash

Software

Open-source feature flag and experimentation service

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Flagsmith the Free plan supports only a single team member, limiting collaboration for small teams.; Unleash the Pay-As-You-Go plan is priced per seat, which can get costly for larger teams.
  • They diverge on capability: Flagsmith covers Segments, Unleash covers A/B/n testing.

Where they differ

Only the attributes on which Flagsmith and Unleash actually diverge.

Attributes where Flagsmith and Unleash differ
AttributeFlagsmithUnleash
Platformsweb, apiweb, api, linux

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), 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 Flagsmith

  • Segments
  • A/B testing
  • Scheduled flags
  • SAML/SSO

Only in Unleash

  • A/B/n testing
  • Custom targeting
  • SSO
  • Audit logs

Both cover

  • Feature flags
  • SDKs

What people use each for

The jobs each tool is most often brought in to do.

Flagsmith

  • Gradual feature rollouts across environmentsnot Unleash
  • Remote configuration without redeploying codenot Unleash
  • Running A/B tests tied to feature flagsnot Unleash
  • Self-hosting feature flags for data residency requirementsnot Unleash

Unleash

  • Gradual and progressive feature rolloutsnot Flagsmith
  • Running A/B/n experiments tied to flagsnot Flagsmith
  • Self-hosting feature management for compliance needsnot Flagsmith
  • Enterprise SSO-controlled feature flag governancenot 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.

Unleash

  • The Pay-As-You-Go plan is priced per seat, which can get costly for larger teams.
  • Self-hosted Enterprise requires a minimum of 5 seats and an annual contract.
  • Additional API traffic beyond the included quota is billed per million requests.
  • Advanced SLAs and dedicated customer success are reserved for the custom Enterprise tier.

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

Unleash

Free
  • Pay-As-You-Go$75/month
    • Cloud-hosted
    • 53M API requests/month included
    • Unlimited feature flags, projects and environments
  • Custom Enterprise$undefined/mo
    • Cloud, self-hosted or hybrid
    • Premium support options
    • 99.99% uptime SLA

Which should you pick?

Choose Flagsmith if

  • You need segments.
  • You want to start without paying.
  • You work on web, api.
  • You also want a/b testing.
Flagsmith review

Choose Unleash if

  • You need a/b/n testing.
  • You want to start without paying.
  • You work on web, api, linux.
  • You also want custom targeting.
Unleash review

Questions people ask

Is Flagsmith or Unleash better?
Neither clearly leads. Flagsmith starts at Free and Unleash at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flagsmith or Unleash?
Flagsmith starts at Free and Unleash at Free.
Does Flagsmith or Unleash run on more platforms?
Flagsmith runs on web, api. Unleash runs on web, api, linux.
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 Unleash is typically brought in for.
What can Flagsmith do that Unleash cannot?
Flagsmith covers Segments, A/B testing, Scheduled flags, SAML/SSO. Unleash covers A/B/n testing, Custom targeting, SSO, Audit logs. Both handle Feature flags, SDKs.

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.

Source
Unleash: What does Unleash cost?

Unleash offers a Pay-As-You-Go cloud plan at $75/seat/month with a 14-day free trial, plus a custom-priced Enterprise plan for self-hosted or hybrid deployments.

Source
Flagsmith: 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.

Source
Unleash: How is usage metered?

The Pay-As-You-Go plan includes 53M API requests per month, with additional traffic billed at $5 per million requests thereafter.

Source
Flagsmith: 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.

Source
Unleash: What does Unleash integrate with, and is there an API?

Unleash provides an API and 25+ official SDKs across languages, along with SSO integrations via SAML 2.0 and OpenID Connect.

Source
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