💡 The honest case for consolidation

One platform.
Not five vendor contracts.

Auth0 charges per MAU. Stripe doesn't do auth. LaunchDarkly doesn't do billing. Keygen doesn't do feature flags. Bastionary does all five — self-hosted, one binary, one API.

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The problem

The five-vendor tax is real

Most SaaS products assemble their auth + billing + licensing + flags stack from 3–6 vendors. Each one adds complexity, cost, and another integration to maintain.

🧩
5 contracts, 5 SLAs, 5 failure modes
Every vendor outage is your outage. When Auth0 goes down, your login page goes down. When Stripe has a webhook delay, your feature flags get stale. Blast radius = all five.
🔌
Every integration is a bug surface
Syncing user identity across Auth0 + Stripe + LaunchDarkly requires custom glue code that breaks when any vendor changes an API. That glue code is never prioritized, never tested.
💸
The cost compounds fast
Auth0 at 50K MAU: ~$850/mo. Clerk scales with MRU — costs vary, check clerk.com. Add LaunchDarkly ($400+), Keygen ($99+), and Stripe markup. You're at $1,500+/mo before you hit enterprise features. Bastionary: $0.
What Bastionary replaces

Five tools. One platform.

🔐
Auth0 / Clerk
↓
OIDC, SAML, MFA, passkeys, social login, risk engine, flow builder
💳
Stripe Billing
↓
Subscriptions, one-time charges, metered billing, trials, dunning, refunds
🚩
LaunchDarkly
↓
Per-user feature flags, percentage rollouts, tier gates, A/B segments
🔑
Keygen / Cryptlex
↓
Software license keys, offline activation, seat management, floating licenses
🏢
Okta / WorkOS
↓
SCIM provisioning, JIT org creation, enterprise SSO, domain-based routing
The math

At 50,000 MAU

Tool 5-vendor stack Bastionary
Auth & identity (Auth0)~$850/mo$0
Feature flags (LaunchDarkly)~$400/mo$0
Software licensing (Keygen)~$99/mo$0
Enterprise SSO (WorkOS)~$125/mo per connection (Last verified Apr 2026)$0
Billing (Stripe flat)2.9% + 30¢ / txnPass-through only
Integration maintenance1–2 eng weeks/quarter0
Monthly infrastructure cost$1,500+/mo$0

*Bastionary is free self-hosted. Cloud-managed hosting is also available from $29/mo — see pricing. Stripe/Paddle payment processing fees still apply — Bastionary doesn't touch transaction fees.

Deploy in 5 minutes.
Own it forever.

One docker run command. No vendor onboarding, no per-MAU pricing, no lock-in.

Start free trial → Read the docs