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Flagsmith vs HashiCorp Vault

Flagsmith logo

Flagsmith

Software Development

Open-source feature flag and remote config platform

From
Free
Rated
-
Full reviewWebsite
HashiCorp Vault logo

HashiCorp Vault

Cybersecurity

Manage secrets and protect sensitive data

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.; HashiCorp Vault policies are written in HCL with no graphical user interface for policy management or editing
  • They diverge on capability: Flagsmith covers Feature flags, HashiCorp Vault covers Secret storage.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Flagsmith and HashiCorp Vault actually diverge.

Attributes where Flagsmith and HashiCorp Vault differ
AttributeFlagsmithHashiCorp Vault
Pricing modelfreemiumopen-source
Platformsweb, apiLinux, Windows, Mac, Api
CategorySoftware DevelopmentCybersecurity
FoundedUnknown2014

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 HashiCorp Vault

  • Secret storage
  • Dynamic secrets
  • Encryption as a service
  • Identity-based access
  • Audit logging
  • Leasing and renewal
  • Secret engines
  • Auth methods

What people use each for

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

Flagsmith

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

HashiCorp Vault

  • Secrets managementnot Flagsmith
  • Database credentialsnot Flagsmith
  • API keysnot Flagsmith
  • SSH accessnot Flagsmith
  • PKI and certificatesnot 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.

HashiCorp Vault

  • Policies are written in HCL with no graphical user interface for policy management or editing
  • Unsealing requires managing multiple key shares and coordinating a quorum of operators
  • Community Edition lacks enterprise features like namespaces and disaster recovery replication
  • Requires additional monitoring solutions for alerting and observability

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

HashiCorp Vault

Free
  • Open SourceFree
    • Secrets management
    • Encryption
    • Community support
  • Vault Enterprise$6000/year
    • Replication
    • HSM support
    • Advanced audit

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.
Flagsmith review

Choose HashiCorp Vault if

  • You need secret storage.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Api.
  • You also want dynamic secrets.
HashiCorp Vault review

Questions people ask

Is Flagsmith or HashiCorp Vault better?
Neither clearly leads. Flagsmith starts at Free and HashiCorp Vault at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Flagsmith or HashiCorp Vault?
Flagsmith starts at Free and HashiCorp Vault at Free.
Does Flagsmith or HashiCorp Vault run on more platforms?
Flagsmith runs on web, api. HashiCorp Vault runs on Linux, Windows, Mac, Api.
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 HashiCorp Vault is typically brought in for.
What can Flagsmith do that HashiCorp Vault cannot?
Flagsmith covers Feature flags, Segments, A/B testing, Scheduled flags. HashiCorp Vault covers Secret storage, Dynamic secrets, Encryption as a service, Identity-based access.

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
HashiCorp Vault: Does HashiCorp Vault have a free version?

Yes. The open-source Community Edition is completely free and includes core secrets management, dynamic secrets, and encryption as a service. It is self-hosted with no licensing fees or secret count limits, but lacks enterprise features like namespaces, disaster recovery replication, and Sentinel policies.

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
HashiCorp Vault: Can I use HashiCorp Vault in production?

The Community Edition is suitable for non-production environments and small teams. For production deployments, organizations typically use HCP Vault Dedicated (managed cloud service starting at approximately 22 USD per month) or Vault Enterprise with custom pricing that includes disaster recovery, performance replication, and 24/7 support.

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
HashiCorp Vault: What are the main integrations available?

Vault integrates with AWS, Azure, Google Cloud, Active Directory, Okta, and 80+ other platforms. It supports dynamic credential generation for cloud providers, database systems, and identity services, enabling centralized secret management across multi-cloud infrastructure.

Source
HashiCorp Vault: Does Vault work offline?

Vault requires network connectivity to function as it is a centralized secrets management server. However, it can be deployed on-premises for air-gapped environments, and clients can cache short-lived tokens for temporary offline access once authenticated.

Source
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