| What it does | Open-source API mock server for multiple protocols
| Python framework for building and simulating dynamical systems using block diagrams
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Freemium
| Open source
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| Pricing | Free: $0/month with 10,000 requests/month and local mocks only. Pro: $29/month with 250,000 requests/month, 100,000 platform AI tokens/month, and 3 hosted mocks. Team: $99/month with 1,000,000 requests/month, 1,000,000 platform AI tokens/month, and unlimited hosted mocks. Annual plans include 2 mont
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| Key features | - Multi-protocol support (REST, gRPC, GraphQL, WebSocket, Kafka, MQTT and more)
- Realistic data synthesis with template tokens and faker fields
- Latency and fault injection for testing retries and fallbacks
- Record and replay for capturing and replaying live traffic
- Modern admin UI for managing servers, overrides and metrics
- Configuration as code with OpenAPI specs and YAML
- Local-first development without account requirement
- CI integration with local endpoints
- HTTP bridge exposing gRPC services over REST
- BYOK AI integration with user provider keys
| - 30+ solvers including implicit, explicit, and adaptive integrators
- Zero-crossing detection and scheduled events for hybrid systems
- Hot-swappable blocks and solvers during active simulation
- Hierarchical subsystems for modular component design
- MIMO support with multiple input and output ports
- Browser-based visual editor with PathView
- Domain toolboxes for chemical, battery, vehicle, flight, and RF engineering
- Custom blocks through subclassing the base Block class
- Supports continuous-time, discrete-time, and hybrid systems
- FMI integration to wrap Co-Simulation and Model-Exchange FMUs
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| What makes it different | - Multi-protocol mocking from one configuration file
- Realism-first simulation with data synthesis and failure injection
- Open source with permissive MIT or Apache-2.0 licensing
- Local-first approach with optional cloud collaboration
- Deploy to cloud hosting with a single command
| - Readable, scriptable alternative to traditional simulation tools with solver depth
- Full ecosystem including FastSim Rust engine and standalone C code generation
- Minimal runtime dependencies: only numpy, scipy, and matplotlib
- Domain-specific toolboxes for chemical, battery, vehicle, flight, and RF engineering
- MIT license with open source development
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 9 ● no change since last check | 38 ▼ −1 (down) since last check |
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| Trust Flow (Majestic) | 0 | 6 |
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| Citation Flow (Majestic) | 17 | 14 |
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| Referring domains (Majestic) | 7 | 18 |
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MockForge