AI Tools
Best Prompt Engineering Tools in 2026
- 01
Agenta Agenta suits teams that want to create, automate, and monitor AI agents across connected tools.
From $29/mo Free plan Open source Web · API · Self-hosted9.3 Visit Specs - 02
DeepEval DeepEval suits developers building evaluation pipelines for AI systems, particularly those who want tests to run in CI/CD or Python scripts.
From $200/mo Free plan Open source Web · Windows · macOS · Linux9.3 Visit Specs - 03
Braintrust Braintrust is aimed at teams operating AI agents in production, from early-stage teams to enterprises.
From $249/mo Free plan Web · API · Self-hosted9.2 Visit Specs - 04
LangSmith LangSmith suits teams engineering AI agents that need evaluation, tracing, prompt work, deployment, and production monitoring.
From $39/mo Free plan Web · Windows · macOS · Linux9.1 Visit Specs - 05
Langfuse Langfuse suits teams building AI agent applications that need tracing, prompt management, and evaluation tools.
From $29/mo Free plan Open source Web · Linux · API · Self-hosted9.0 Visit Specs - 06 Vellum
Vellum suits an individual looking for an assistant that can handle files, calendars, email, code, and computer control.
From $30/mo Free plan Open source Web · Windows · macOS · iOS8.6 Visit Specs - 07
W&B Weave Weave suits teams monitoring and evaluating production AI agents, particularly those using supported frameworks and models.
From $60/mo Free plan Open source Web · Windows · macOS · Linux8.6 Visit Specs - 08 ChainForge
ChainForge suits people comparing prompts and model responses through visual experiments, including those who want to score or plot results.
Free plan Web · Self-hosted8.5 Visit Specs - 09
Promptfoo It suits developers and enterprises evaluating prompts or testing AI applications for risks.
Free plan Open source Web · Windows · macOS · Linux8.5 Visit Specs - 10
Giskard Giskard suits teams evaluating conversational AI agents for security and quality issues before production.
Free plan Web · Linux · API · Self-hosted8.2 Visit Specs - 11
Maxim AI It suits cross-functional AI teams that need to evaluate agents and monitor them in production.
From $29/mo Free plan Web · API · Self-hosted8.2 Visit Specs - 12 Arize Phoenix
It suits teams operating AI applications that need model, retrieval, tool, prompt, and evaluation tracing.
Free plan Web · API · Self-hosted8.1 Visit Specs - 13
Laminar Laminar suits teams instrumenting AI-agent systems that need tracing, evaluations, debugging, and dashboards.
From $30/mo Free plan Web · API · Self-hosted8.1 Visit Specs - 14 TruLens Free plan Open source API · Self-hosted7.9 Visit Specs
- 15
Galileo Galileo is designed for engineers, product managers and subject matter experts building AI applications.
From $100/mo Web · API · Self-hosted7.8 Visit Specs - 16
HoneyHive HoneyHive is aimed at AI platform teams, AI engineers, domain experts, and risk or governance teams.
Free plan Web · API · Self-hosted7.8 Visit Specs - 17
PromptLayer PromptLayer is for engineers and domain experts who build or improve AI products together.
From $49/mo Free plan Web · API · Self-hosted7.8 Visit Specs - 18
ProofHound It suits operations, risk, and analyst teams handling critical classification workflows such as risk control, financial judgment, content moderation, or customer-service intent recognition.
From $29/mo Free plan Web · API · Self-hosted7.7 Visit Specs - 19 MLflow Model Registry
The registry suits solo data scientists and larger machine-learning platform teams that need model versioning and lifecycle workflows.
Free plan Web · Linux · API · Self-hosted7.6 Visit Specs - 20 DSPy API · Self-hosted7.5 Visit Specs
- 21 TextGrad Linux · Self-hosted6.7 Visit Specs
- 22
Amazon Bedrock Prompt Management Web6.1 Visit Specs - 23 Microsoft Foundry Agent Evaluation Web5.6 Visit Specs
- 24 OpenAI Playground Web5.6 Visit Specs
- 25 PromptTools 5.2 Visit Specs