Free and open first
Best Prompting Tool in 2026
Prompting tools help you write, improve, organize, and share prompts for AI models. This list is for people who want a suitable tool without committing to a large software budget.
- 25 apps
- Research read 10 Oct 2026
- How the order is worked out
- 1
Langfuse
Free plan Open source APILinuxSelf-hosted+1Langfuse brings tracing, prompt workflows, and evaluation features into one AI engineering platform, with both hosted and self-hosted options.
- 2
LangSmith
Free plan APILinuxMac+3LangSmith combines agent evaluation with prompt tools and observability, including cost and trajectory tracking.
- 3
PromptHub
Free plan APIWebPromptHub brings prompt versioning, evaluation, and deployment options into one platform. Its free plan is limited to public prompts, while private collaboration requires a paid plan.
- 4
PromptLayer
Free plan APISelf-hostedWebPromptLayer brings prompt editing, evaluation, and operational monitoring into one workflow, with collaboration features for technical and non-technical contributors.
- 5
Promptitude
Free plan APIWebPromptitude combines prompt development, sharing and API integration, with a limited free plan and paid tiers.
- 6
PromptOps Manager
Free plan APISelf-hostedWebPromptOps Manager provides a self-hosted workflow for prompt versions, tests, and environment promotion.
- 7
ProofHound
Free plan APISelf-hostedWebChoose ProofHound for LLM classification workflows that need prompt iteration, auditable experiments, and controlled deployment.
- 8
SpacePrompts
Free plan APIExtensionWebPick SpacePrompts if you want a place to manage prompt versions, test prompts, and use browser extensions or an API.
- 9
PromptSource
Free plan APISelf-hostedWebPromptSource combines a prompt editor, dataset views, an API, and a substantial English prompt collection. Developers should note its Python requirement and the limits of the hosted Sourcing mode.
- 10
Prompt Builder
Free plan LinuxMacWeb+1 - 11
AIPRM
Free plan Web - 12
Armarium
Free plan Windows - 13
ImprovePrompt
Free plan Web - 14
PromptHero
Free plan AndroidiPhoneWeb - 15
Promhance
Free plan Web - 16
PromptDrive
Free plan Web - 17
PromptForge
Free plan Web - 18
Prompted
Free plan Web - 19
Open Prompt Manager
Free plan - 20
PromptEnhance
Free plan Web - 21
Promptimize
Free plan Web - 22
PromptMania
Free plan Web - 23
Promptomania
Free plan Web - 24
Prompt Optimizer
Free plan Web - 25
The Prompt Library
Free plan Web
#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price
Compare the free plan, paid starting price, and whether a free trial is available. Check the licence when open-source code matters, then confirm platform support and features such as prompt libraries, prompt improvement, model support, team sharing, browser extensions, and export formats.
Questions
What does a prompting tool do?
It helps you write, improve, organize, share, or export prompts used with AI models.
Are free prompting tools available?
Yes. Items on this list offer free plans, including free and freemium options. Check the plan terms for the features you need.
Do prompting tools offer free trials?
A free trial is available from items on this list. Check the specific tool for trial terms and what happens when the trial ends.
Can I use a prompting tool through an API or self-host it?
Platform options represented here include web, API, self-hosted, Linux, Windows, and macOS. Confirm support for the tool you choose.
What paid prices are listed?
Examples include Armarium at $39, Langfuse at $29 per month, PromptForge at €7.99 per month, and LangSmith at $39 per user per month.