ClinikAPI vs Medplum: Managed FHIR vs Open-Source FHIR (2026)

If you're choosing a FHIR backend in 2026, ClinikAPI and Medplum will both show up on your shortlist — and they're often pitched as competitors. But they solve the same problem in opposite ways. ClinikAPI is managed FHIR with a simplified API: you send flat JSON, we handle the FHIR and the compliance. Medplum is an open-source FHIR server: you work with raw FHIR and can host it yourself. This is an honest comparison — including where each one falls short — so you can pick the right fit.

We build ClinikAPI, so we'll be upfront about our bias — and equally upfront about when Medplum is the better choice. Here's why we recommend ClinikAPI for most teams building new clinical apps:

• No FHIR expertise needed: Send plain JSON; we convert it to FHIR R4 under the hood.
• Ship fast: Pre-built React components and managed compliance get you to a prototype in hours.
• Compliance included: HIPAA-compliant, SOC 2-audited, with a signed BAA — nothing to configure.
• Transparent pricing: A free sandbox, then simple per-request plans.
• But not for everyone: If you need self-hosting or full FHIR control, Medplum may fit better.

Quick Answer

ClinikAPI is managed FHIR with a simplified JSON API and pre-built components — best for shipping clinical apps fast without FHIR expertise. Medplum is an open-source FHIR server you can self-host — best for teams that want full control and have FHIR knowledge. With ClinikAPI you create a patient using flat fields like firstName and never see raw FHIR; with Medplum you work directly with FHIR resources and own your infrastructure. ClinikAPI includes HIPAA compliance and a BAA and has transparent pricing from a free sandbox; Medplum's software is free but self-hosting adds infrastructure cost, engineering time, and DIY compliance. Choose ClinikAPI for speed and simplicity; choose Medplum for control and self-hosting. Both use FHIR R4, so you can switch later.

The core difference: managed vs open-source

Everything else flows from this one distinction:

ClinikAPI trades control for speed; Medplum trades speed for control. Neither is "better" — it depends on what you're building.

Developer experience: the clearest contrast

The difference is obvious the moment you create a patient. With ClinikAPI, you send plain fields:

// ClinikAPI — flat JSON, no FHIR knowledge needed
const { data } = await clinik.patients.create({
  firstName: 'Jane', lastName: 'Doe', email: '[email protected]',
  gender: 'female', birthDate: '1990-03-15',
})

With Medplum, you build the FHIR resource yourself:

// Medplum — you work with raw FHIR
const patient = await medplum.createResource({
  resourceType: 'Patient',
  name: [{ given: ['Jane'], family: 'Doe' }],
  telecom: [{ system: 'email', value: '[email protected]' }],
  gender: 'female', birthDate: '1990-03-15',
})

Both create a valid FHIR Patient. ClinikAPI hides the FHIR; Medplum exposes it. If your team knows FHIR and wants that power, Medplum's approach is a feature. If they don't, ClinikAPI's approach is a gift. (See FHIR Without the Expertise.)

Where ClinikAPI falls short

Honesty matters in a comparison, so here's where Medplum wins:

• No self-hosting. ClinikAPI is managed only. If you must deploy on-premise for regulatory reasons, Medplum's open-source self-hosting is the right call.
• Not open-source. You can't inspect or modify ClinikAPI's server code the way you can Medplum's.
• Newer platform. Medplum has a larger community and more third-party tutorials today.

If any of those are dealbreakers, Medplum is likely your platform — and that's fine.

Where Medplum falls short

And here's the flip side:

• FHIR expertise required. The power of raw FHIR comes with a steep learning curve.
• Self-hosting is real work. Infrastructure, scaling, backups, patches, monitoring, on-call — it's ongoing.
• Multi-tenancy is DIY. Building a SaaS for multiple clinics? You implement tenant isolation yourself.
• Compliance is partly DIY (self-host). Encryption config, audit logging, and BAA management fall to you.

For a small team racing to an MVP, those costs add up fast. (See Managed FHIR vs Self-Hosted FHIR and The Real Cost of a FHIR Server.)

Pricing, honestly

ClinikAPI is transparent: a free sandbox (1,000 requests/month), then plans from about $49/month, with a BAA included on production plans. Medplum's software is free, but self-hosting typically runs $200–$500+/month in cloud infrastructure plus engineering time and your own compliance work; their cloud pricing isn't publicly listed.

The honest takeaway: "free" open-source is rarely free once you count infrastructure and engineering hours. For many teams, managed ends up cheaper and faster.

Which should you choose?

Choose ClinikAPI if you're building a new clinical app, your team lacks deep FHIR expertise, you want to ship fast with pre-built components, you need a multi-tenant SaaS, and you want HIPAA compliance handled with transparent pricing.

Choose Medplum if your team knows FHIR well, you need full control over the server, you have regulatory reasons to self-host, you want to customize the FHIR server itself, and you have engineering resources for infrastructure.

And remember: both use FHIR R4, so starting with one doesn't lock you in.

Frequently Asked Questions

1. What's the difference between ClinikAPI and Medplum?

ClinikAPI is managed FHIR with a simplified JSON API and pre-built components; Medplum is an open-source FHIR server you can self-host with raw FHIR access. Speed vs control.

2. Do I need to know FHIR?

For ClinikAPI, no — flat JSON abstracts it away. For Medplum, yes — you work with FHIR resources directly.

3. Is Medplum free and is ClinikAPI cheaper?

Medplum's software is free, but self-hosting adds infrastructure, engineering, and DIY compliance costs. ClinikAPI is managed with transparent pricing and a BAA included — often cheaper once hidden costs are counted.

4. Can I self-host ClinikAPI?

No — it's managed only. If you need self-hosting, Medplum is the better fit.

5. Can I switch later?

Yes. Both use FHIR R4, so data is portable in either direction.

Conclusion

ClinikAPI and Medplum both give you a FHIR backend, but they're built for different teams. ClinikAPI is for builders who want to ship a clinical app fast without becoming FHIR experts or running infrastructure. Medplum is for teams who want full control, open-source code, and self-hosting — and have the FHIR skills to use them. Match the tool to your team and your constraints, and know that the shared FHIR standard means you can always change your mind later.

Key takeaways:

• ClinikAPI is managed FHIR with a simplified API; Medplum is open-source and self-hostable.
• ClinikAPI needs no FHIR expertise; Medplum requires it.
• ClinikAPI includes HIPAA compliance and a BAA; self-hosted Medplum is DIY.
• "Free" Medplum has real infrastructure and engineering costs.
• Both use FHIR R4, so you're never locked in.

Building a clinical app fast? Try ClinikAPI free or explore the platform.

Related Articles

• Best Medplum Alternatives in 2026
• Managed FHIR vs Self-Hosted FHIR
• The Real Cost of a FHIR Server: Self-Hosted vs Managed
• FHIR Without the Expertise
• Best Healthcare APIs in 2026