FlagBox vs Flagsmith Flat-rate billing.
No overage bills.
Just simple flags.
Flagsmith bills by API call volume — and those calls add up fast on server-rendered or high-traffic apps. FlagBox is flat-rate, so your costs stay predictable however you build.
The API-call billing problem
Flagsmith's pricing is tied to how many times your app calls their API — which can spiral.
How Flagsmith counts calls: Each time a user loads your app or a server renders a page, that's one API call against your monthly limit. A server-rendered app with 10,000 daily page views = 300,000 calls/month. Flagsmith's Start-Up plan includes 1 million calls — but once you exceed it, overages are billed at $7 per 100k additional calls.
1M calls/mo (base plan)
$45/mo
$59/mo (Growth)
2M calls/mo (1M over)
$45 + $70 = $115/mo
$59/mo — no change
5M calls/mo (4M over)
$45 + $280 = $325/mo
$59/mo — no change
10M calls/mo (9M over)
$45 + $630 = $675/mo
$199/mo (Business plan)
FlagBox uses flat-rate billing. The Business plan at $199/mo means your bill stays the same however your traffic grows — no per-call metering, no surprise charges at the end of the month.
Plan-for-plan pricing
What you get for your money on each platform.
$59 / month
all users included — no per-seat, no per-call fees
- ✓ 20 active flags
- ✓ 50 users
- ✓ Flat-rate billing — no per-call charges
- ✓ 10 environments
- ✓ SAML / SSO included
- ✓ Audit trail included
- ✓ No overage charges ever
$45 / month
+ $7 per 100k calls over 1M/month
- ✓ Unlimited flags
- ✓ 3 team members
- ✕ 1M API calls/month (then overages)
- ✕ Unlimited environments not included
- ✕ SAML requires Enterprise plan
- ✕ Bill scales with traffic
- ✕ Hard to budget for growing apps
Feature comparison
Where each platform is strong.
| Feature | FlagBox | Flagsmith |
| Feature flags & toggles | ✓ | ✓ |
| Percentage rollouts | ✓ | ✓ |
| User segment targeting | ✓ | ✓ |
| A/B / multivariate testing | ✓ | ✓ |
| Remote config | ✓ | ✓ |
| Multiple environments | ✓ All plans | ✓ All plans |
| Audit trail | ✓ | ✓ |
| JavaScript / React SDK | ✓ | ✓ |
| Analytics integrations | ✕ | ✓ Amplitude, Heap, more |
| Predictable flat-rate billing | ✓ All plans | ✕ Overage fees apply |
| Flat-rate pricing | ✓ | ✕ |
| SAML / SSO | ✓ Growth+ | Enterprise only |
| Self-hostable | ✕ | ✓ Open source |
| Free trial without credit card | ✓ | ✓ |
Which tool fits your situation?
Honest guidance on when each is the better choice.
Choose FlagBox if you…
- Have a server-rendered or high-traffic app
- Want a predictable bill regardless of traffic
- Need SAML without paying enterprise prices
- Prefer simplicity over open-source control
- Have a small team and want everyone in the tool
Consider Flagsmith if you…
- Need deep analytics integrations (Amplitude, Heap)
- Need to self-host for compliance reasons
- Have low-traffic apps with predictable call volume
- Want an open-source codebase to extend
Predictable pricing.
Simple feature flags.
No per-call billing. No overage surprises. Your whole team, one flat rate.
Start your free trial → Solo plan free forever · Startup from $9/mo · Growth from $59/mo
Flagsmith pricing data sourced from public documentation and G2 reviews. Subject to change — verify at flagsmith.com.
