Open source focus

Open Source Alternatives to Tester Flow

34 open source AI Testing options similar to Tester Flow, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Recognai, S.L.U.31
Data CurationBarcelona, Spain
Company
Open source
Probabl54
MLOpsParis, France$18.5M
Track experiments, validate models, and collaborate with confidence using Skore, the methodology layer for AI coding tools.
Open source
KiloClaw54
Artificial Intelligence
A managed, private, and production-grade environment for OpenClaw, offering access to over 500 AI models and essential tools.
Open source · Self-hostable
Feast AI54
MLOpsSan Francisco, United States
An open-source feature store for managing and serving data for AI/ML models in production.
Open source · Self-hostable
RelAI51
Agentic AISan Francisco, United States$6.9M
An open-source platform for building, simulating, evaluating, and optimizing reliable AI agents.
Open source · Self-hostable
Keep45
EnterpriseSan Francisco, United States$2.5M
Open-source alert management platform using AI to reduce noise and improve alert actionability for engineers.
Open source · Self-hostable
BenchFlow42
Frontier AI LabSan Francisco, United States$1.0M
BenchFlow is a frontier environment lab that builds environments for AI agents to learn and be evaluated on real computer work.
Open source
Cua39
AI AgentSan Francisco, United States$500K
Cua provides an open-source framework and cloud desktops for AI agents to control operating systems and desktop applications across Linux, Windows, macOS, and Android.
Open source
CRAB27
Agentic AI
An open-source framework for building, operating, and benchmarking Multimodal Language Model (MLM) agents across diverse environments.
Open source · Self-hostable
LLMStack16
Agentic AI
Open-source, no-code platform for building and deploying AI agents, workflows, and generative AI applications.
Open source · Self-hostable
Selenium10
Open Source
An open-source framework for automating web browsers for testing and administration tasks.
Open source · Self-hostable
Glovity8
AI Infrastructure
Glovity is an open-source, low-cost teleoperation system for dexterous manipulation, integrating spatial wrench feedback with a haptic glove.
Open source
HU
HumanSignal7
Agentic AI
Adala is an Autonomous DAta (Labeling) Agent framework for data processing and labeling tasks.
Open source · Self-hostable
Grafana Labs80
ObservabilityNew York, United States
Commercializes the open-source Grafana observability platform with AI features.
Open source · Self-hostable
Posit67
Data Science PlatformBoston, United States$169.9M
Open-source data science platform for enterprise teams, enabling collaboration and reproducible results.
Open source · Self-hostable
Firebolt65
Cloud Data WarehousePalo Alto, United States$264.0M
Cloud data warehouse for building next-gen analytics experiences with sub-second performance, designed for engineers and AI agents.
Open source
H2O.ai64
Foundation ModelMountain View, United States$228.1M
An open-source AI and machine learning platform for enterprises.
Open source · Self-hostable
ClearML63
AutoMLTel Aviv, Israel$11.0M
Open-source, end-to-end MLOps platform for enterprise AI development and deployment.
Open source · Self-hostable
Metabase60
Data AnalyticsSan Francisco, United States$8.0M
Open-source business intelligence and embedded analytics platform.
Open source · Self-hostable
Mirantis58
Cloud InfrastructureCampbell, United States$255.0M
Mirantis provides cloud-native infrastructure and AI platforms for enterprises to manage and operate complex environments.
Open source · Self-hostable
Backstage57
Developer ToolsStockholm, Sweden$63.0M
An open-source developer portal for building and managing software.
Open source · Self-hostable
DVC54
MLOpsSan Francisco, United States$154.0M
Open-source platform for ML experiment tracking and data versioning.
Open source · Self-hostable
WireMock53
Enterprise$6.5M
Industry-standard API simulation and mocking platform for reliable software development and testing.
Open source · Self-hostable
Testkube39
MLOpsTel Aviv, Israel$12.0M
Open-source Kubernetes-native testing framework for CI/CD.
Open source · Self-hostable
MA
Macrodata Labs39
Artificial IntelligenceParis, France$4.0M
Infrastructure for the robotics data loop.
Open source · Self-hostable
Amplication33
EnterpriseTel Aviv, Israel
Open-source Node.js backend development platform for accelerating application development.
Open source · Self-hostable
Langflow32
Agentic AILisbon, Portugal
Low-code platform for building, iterating, and deploying AI applications, especially RAG and multi-agent systems.
Open source · Self-hostable
Swagger26
API DevelopmentSomerville, United States
A suite of open-source and professional tools for API design, development, documentation, and testing.
Open source · Self-hostable
MLflow25
MLOpsSeattle, United States
Open-source platform for managing the ML lifecycle, from experimentation to deployment.
Open source · Self-hostable
Apache Airflow20
MLOps
Open-source platform for programmatically authoring, scheduling, and monitoring data pipelines.
Open source · Self-hostable
API Platform16
API PlatformParis, France
Open-source framework for building and documenting APIs with a focus on developer experience.
Open source · Self-hostable
GG
ggml15
Foundation Model
A C/C++ tensor library for efficient machine learning inference on consumer hardware.
Open source · Self-hostable
Maige10
Open Source
Open-source infrastructure for automating natural language workflows directly on your codebase.
Open source · Self-hostable
Agentjail10
Agentic AI
Policy guardrails for coding agents to block dangerous tool calls before they are fired.
Open source

Company	Sector	License	HQ	Funding	Score
Recognai, S.L.U.Company	Data Curation	Open source	Barcelona, Spain	—	31
ProbablTrack experiments, validate models, and collaborate with confidence using Skore, the methodology layer for AI coding tools.	MLOps	Open source	Paris, France	$18.5M	54
KiloClawA managed, private, and production-grade environment for OpenClaw, offering access to over 500 AI models and essential tools.	Artificial Intelligence	Open source · Self-hostable	—	—	54
Feast AIAn open-source feature store for managing and serving data for AI/ML models in production.	MLOps	Open source · Self-hostable	San Francisco, United States	—	54
RelAIAn open-source platform for building, simulating, evaluating, and optimizing reliable AI agents.	Agentic AI	Open source · Self-hostable	San Francisco, United States	$6.9M	51
KeepOpen-source alert management platform using AI to reduce noise and improve alert actionability for engineers.	Enterprise	Open source · Self-hostable	San Francisco, United States	$2.5M	45
BenchFlowBenchFlow is a frontier environment lab that builds environments for AI agents to learn and be evaluated on real computer work.	Frontier AI Lab	Open source	San Francisco, United States	$1.0M	42
CuaCua provides an open-source framework and cloud desktops for AI agents to control operating systems and desktop applications across Linux, Windows, macOS, and Android.	AI Agent	Open source	San Francisco, United States	$500K	39
CRABAn open-source framework for building, operating, and benchmarking Multimodal Language Model (MLM) agents across diverse environments.	Agentic AI	Open source · Self-hostable	—	—	27
LLMStackOpen-source, no-code platform for building and deploying AI agents, workflows, and generative AI applications.	Agentic AI	Open source · Self-hostable	—	—	16
SeleniumAn open-source framework for automating web browsers for testing and administration tasks.	Open Source	Open source · Self-hostable	—	—	10
GlovityGlovity is an open-source, low-cost teleoperation system for dexterous manipulation, integrating spatial wrench feedback with a haptic glove.	AI Infrastructure	Open source	—	—	8
HUHumanSignalAdala is an Autonomous DAta (Labeling) Agent framework for data processing and labeling tasks.	Agentic AI	Open source · Self-hostable	—	—	7
Grafana LabsCommercializes the open-source Grafana observability platform with AI features.	Observability	Open source · Self-hostable	New York, United States	—	80
PositOpen-source data science platform for enterprise teams, enabling collaboration and reproducible results.	Data Science Platform	Open source · Self-hostable	Boston, United States	$169.9M	67
FireboltCloud data warehouse for building next-gen analytics experiences with sub-second performance, designed for engineers and AI agents.	Cloud Data Warehouse	Open source	Palo Alto, United States	$264.0M	65
H2O.aiAn open-source AI and machine learning platform for enterprises.	Foundation Model	Open source · Self-hostable	Mountain View, United States	$228.1M	64
ClearMLOpen-source, end-to-end MLOps platform for enterprise AI development and deployment.	AutoML	Open source · Self-hostable	Tel Aviv, Israel	$11.0M	63
MetabaseOpen-source business intelligence and embedded analytics platform.	Data Analytics	Open source · Self-hostable	San Francisco, United States	$8.0M	60
MirantisMirantis provides cloud-native infrastructure and AI platforms for enterprises to manage and operate complex environments.	Cloud Infrastructure	Open source · Self-hostable	Campbell, United States	$255.0M	58
BackstageAn open-source developer portal for building and managing software.	Developer Tools	Open source · Self-hostable	Stockholm, Sweden	$63.0M	57
DVCOpen-source platform for ML experiment tracking and data versioning.	MLOps	Open source · Self-hostable	San Francisco, United States	$154.0M	54
WireMockIndustry-standard API simulation and mocking platform for reliable software development and testing.	Enterprise	Open source · Self-hostable	—	$6.5M	53
TestkubeOpen-source Kubernetes-native testing framework for CI/CD.	MLOps	Open source · Self-hostable	Tel Aviv, Israel	$12.0M	39
MAMacrodata LabsInfrastructure for the robotics data loop.	Artificial Intelligence	Open source · Self-hostable	Paris, France	$4.0M	39
AmplicationOpen-source Node.js backend development platform for accelerating application development.	Enterprise	Open source · Self-hostable	Tel Aviv, Israel	—	33
LangflowLow-code platform for building, iterating, and deploying AI applications, especially RAG and multi-agent systems.	Agentic AI	Open source · Self-hostable	Lisbon, Portugal	—	32
SwaggerA suite of open-source and professional tools for API design, development, documentation, and testing.	API Development	Open source · Self-hostable	Somerville, United States	—	26
MLflowOpen-source platform for managing the ML lifecycle, from experimentation to deployment.	MLOps	Open source · Self-hostable	Seattle, United States	—	25
Apache AirflowOpen-source platform for programmatically authoring, scheduling, and monitoring data pipelines.	MLOps	Open source · Self-hostable	—	—	20
API PlatformOpen-source framework for building and documenting APIs with a focus on developer experience.	API Platform	Open source · Self-hostable	Paris, France	—	16
GGggmlA C/C++ tensor library for efficient machine learning inference on consumer hardware.	Foundation Model	Open source · Self-hostable	—	—	15
MaigeOpen-source infrastructure for automating natural language workflows directly on your codebase.	Open Source	Open source · Self-hostable	—	—	10
AgentjailPolicy guardrails for coding agents to block dangerous tool calls before they are fired.	Agentic AI	Open source	—	—	10