FIXSIM
Pricing Plans
FIXSIM costs $500 per month for Starter, $1,500 and up per month for Pro, and Enterprise pricing is custom.
Used by individual developers, QA teams, OMS/EMS vendors, broker-dealers, and exchanges.
Month-to-month subscriptions. No annual contract. Cancel anytime.
Watch a demo or talk to us if you have questions.
All Plans Include:
7-Day Free Trial // No Credit Card Required // No Install - Browser Based // Email Support // Cancel Anytime
Start testing your FIX engine today.
7-day free trial; no install, cancel anytime.
Start Free Trial →For individual developers and contractors validating FIX connectivity.
- Single user login
- Single FIX session
- FIX 4.0 – 5.0SP2 support
- Message blotter - raw FIX + translated tags
- Manual order execution - fills, cancels, rejects, replaces
- Session layer testing - sequencing, resends, recovery
- Application layer testing - business logic and exception paths
No credit card required
For QA teams and OMS/EMS vendors running repeatable regression testing.
- Everything in Starter
- Multiple user logins
- Multiple FIX sessions
- Rule Builder - automate fills, cancels, rejects, replaces
- Replay FIX message logs
- Repeatable regression test scenarios
- High volume message testing
- REST API access for CI/CD integration
For broker-dealers, exchanges, and large fintech teams requiring full simulation at scale.
- Everything in Pro
- Multiple FIXSIM instances
- Acceptor and initiator sessions in the same plan - FIXSIM on either side of the connection
- Venue certification testing workflows
- Dedicated FIXSIM environment
- User roles and instance permissions - ClientAdmin, PowerUser and User
- Single sign-on (SSO) - Microsoft Entra ID, Okta, or any OpenID Connect provider
- Priority support and onboarding
- Custom SLA available
Just exploring? Try FIXSIM free.
The Developer Sandbox is a free hosted FIX endpoint: create a session in one click, connect any FIX engine, and act as the counterparty yourself. No account, no install, no paperwork. It also works from Claude, Cursor, or ChatGPT via the FIXSIM MCP server.
Open the Developer SandboxCompare plans
Every plan includes the FIXSIM counterparty simulator, hosted, with nothing to install.
| Feature | Starter$500 / month | Pro$1,500+ / month | EnterpriseCustom |
|---|---|---|---|
| Connectivity | |||
| FIX 4.0 to 5.0SP2 support | ✓ | ✓ | ✓ |
| FIX sessions | 1 | Multiple | Multiple |
| Session direction, FIXSIM as acceptor (your engine connects in) or initiator (FIXSIM connects out) | Acceptor or initiator | Acceptor or initiator | Acceptors and initiators |
| FIXSIM instances | 1 | 1 | Multiple |
| Dedicated FIXSIM environment | – | – | ✓ |
| Testing | |||
| Message blotter, raw FIX and translated tags | ✓ | ✓ | ✓ |
| Manual order execution, fills, cancels, rejects, replaces | ✓ | ✓ | ✓ |
| Session layer testing, sequencing, resends, recovery | ✓ | ✓ | ✓ |
| Application layer testing, business logic and exception paths | ✓ | ✓ | ✓ |
| Replay FIX message logs | – | ✓ | ✓ |
| Repeatable regression test scenarios | – | ✓ | ✓ |
| High volume message testing | – | ✓ | ✓ |
| Venue certification testing workflows | – | – | ✓ |
| Automation | |||
| Rule Builder, automate fills, cancels, rejects, replaces | – | ✓ | ✓ |
| REST API access for CI/CD integration | – | ✓ | ✓ |
| Team and access | |||
| User logins | 1 | Multiple | Multiple |
| User roles and instance permissions, ClientAdmin, PowerUser and User | – | – | ✓ |
| Single sign-on (SSO), Microsoft Entra ID, Okta, or any OpenID Connect provider | – | – | ✓ |
| Support | |||
| Email support | ✓ | ✓ | ✓ |
| Priority support and onboarding | – | – | ✓ |
| Custom SLA available | – | – | ✓ |
Common Questions
How much does FIXSIM cost?
Starter is $500 per month. Pro starts at $1,500 per month depending on users and sessions. Enterprise pricing is custom. All plans are month-to-month and start with a 7-day free trial.
What does the free trial include?
Full access to Starter plan features for 7 days. No credit card required. Connect your FIX engine and start testing in minutes.
Do I need to install anything?
No. FIXSIM is fully browser-based. Create a session, connect your FIX engine, and start testing immediately.
Is there a free version of FIXSIM?
Yes. The FIXSIM Developer Sandbox is a free, hosted FIX test endpoint: create a session in one click, connect any FIX engine, and act as the counterparty yourself. No account required. For real testing work, paid plans start at $500 per month.
Does FIXSIM support single sign-on (SSO)?
Yes, on the Enterprise plan. FIXSIM supports OpenID Connect single sign-on with Microsoft Entra ID, Okta, and other OIDC identity providers. Users from your approved email domains are provisioned automatically on first sign-in, and your firm can require SSO for every login. See the SSO setup guide for the Entra ID and Okta steps.
Can I upgrade or cancel anytime?
Yes. All plans are month-to-month with no annual contract. Upgrade, downgrade, or cancel at any time.
