Who should use PromptFast?

PromptFast is a B2B product built for AI developers and prompt engineers.

How much does PromptFast cost?

Paid plans start at $15, and a free tier is available.

What platforms does PromptFast run on?

PromptFast runs on the web and API.

Is PromptFast still active?

Unverified. PromptFast has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to PromptFast?

Similar projects tracked by PulseGate include Prompt EASY, ImprovePrompt, and PromptFix.

Who develops PromptFast?

PromptFast is developed by PromptFast.

When did PromptFast launch?

PromptFast first shipped in 2024.

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PromptFast

Name: PromptFast
Price: 15 USD
Author: PromptFast

promptfast.devInfrastructure

PromptFast is a web-based playground for AI and prompt engineers to test, debug, and optimize prompts for large language models. It supports multiple AI providers, instant feedback, and dynamic variables, streamlining the prompt engineering workflow for developers.

FreemiumWebAPICloud-managed

Visit promptfast.dev

Overview

6 features

In the AI space, PromptFast takes a focused approach. It enables AI developers to efficiently test and refine prompts for large language models before deployment. PromptFast is a B2B product aimed at AI developers and prompt engineers. A free plan is available; paid tiers begin at $15. It runs on the web and API.

It is developed by PromptFast, and it first shipped in 2024. Key capabilities include prompt testing, real-time feedback, and multi-model support. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Prompt testing
Real-time feedback
Multi-model support
Dynamic variables
System prompts
API access

Built with & integrations

Framework

Next.js

Hosting

Vercel

AI providers

anthropicopenaimultiple

Connectors

API

Runs on

BrowserAPI-onlyCloud-managed

Detected from

Next.js: x-nextjs-prerender header · /_next/static/ in the HTML · __next_f in the HTML
openai: bgpt- in the HTML
Vercel: x-vercel-id header · x-vercel-cache header
anthropic: bclaude in the HTML

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tier

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed30 Jun · 13:11 UTC
Promptfast verified against its public source
Source: PulseGate · Open

Frequently asked questions about PromptFast

What is PromptFast?: PromptFast enables AI developers to efficiently test and refine prompts for large language models before deployment. It is catalogued under AI on PulseGate.
Who should use PromptFast?: PromptFast is a B2B product built for AI developers and prompt engineers.
How much does PromptFast cost?: Paid plans start at $15, and a free tier is available.
What platforms does PromptFast run on?: PromptFast runs on the web and API.
Is PromptFast still active?: Unverified. PromptFast has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to PromptFast?: Similar projects tracked by PulseGate include Prompt EASY, ImprovePrompt, and PromptFix.Prompt EASY ImprovePrompt PromptFix
Who develops PromptFast?: PromptFast is developed by PromptFast.
When did PromptFast launch?: PromptFast first shipped in 2024.

At a glance

Pricing: Freemium · from $15 · free tier
Platforms: Web
Languages: English
Built for: AI developers and prompt engineers
Model: B2B
Solves: Enables AI developers to efficiently test and refine prompts for large language models before deployment.

Index record

Indexed: 30 Jun 2026
Lifecycle: Alive
Last seen: 30 Jun 2026

Identity audit (12)

Slug: promptfast-promptfast-dev
Lifecycle last checked: 8 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 30 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Canonical URL: https://promptfast.dev/

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