
Free / Open-sourceBuild working apps, websites, and AI agents by describing them
Free / Open-sourceBuild working apps, websites, and AI agents by describing them
Letterly records 53,009 monthly visits with -43.9% month-over-month growth and Freemium pricing. Whisp records 5,543 monthly visits with +84% growth and Paid pricing.

Speak naturally, and let AI turn your voice into polished writing
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | letterly.app | heywhisp.com |
| Pricing Model | Freemium | Paid |
| Monthly Visits | 53.01K (53,009) | 5.54K (5,543) |
| MoM Traffic Delta | -41.48K (-43.9%) | +2.53K (+84%) |
| Primary Market & Share | 🇺🇸 United States (35%) | 🇺🇸 United States (66.5%) |
| Direct Visits / mo | 40.98K | 2.21K |
| User Rating | 4.3 | 4.2 |
| Supported Platforms | Website | Website |

Speak once, get polished text anywhere you type
Speak inside Gmail, Slack, Notion or any other text field and have clean text appear where you were typing, instead of switching apps.
Convert raw speech into notes, emails, posts or meeting summaries using ready-made styles or your own saved formats.
Record up to around 90 minutes, get a transcript split by speaker, and generate a summary alongside the full text.
Language detection happens automatically as you speak, and you can switch mid-sentence without changing settings.

Speak naturally, and let AI turn your voice into polished writing
Speak naturally and Whisp transcribes and edits your voice in real time, stripping filler words and fixing typos into clean, formatted text.
Whisp learns the words, names, and phrases you use most and adds them to a personal memory so recurring terms are recognized correctly.
Store full snippets like scheduling links, FAQs, or your elevator pitch and insert them with a short spoken cue.
Whisp detects the application you are in and adjusts tone automatically, so writing sounds natural in email, documents, or chat.

Free / Open-sourceBuild working apps, websites, and AI agents by describing them
Free / Open-sourceBuild working apps, websites, and AI agents by describing them

AI note taker that transcribes, summarizes and visualizes meetings

Turn any video or audio into text in seconds
Free / Open-sourceFree open-source dictation that runs speech-to-text on your own machine
Free / Open-sourceFree open-source dictation that runs speech-to-text on your own machine
Free / Open-sourceJust speak. Write faster, in any app.

Voice-powered note taking with dictation in 50+ languages
Voice-powered note taking with dictation in 50+ languages

Free / Open-sourceVoice dictation that writes like you talk, in any app
Free / Open-sourceVoice dictation that writes like you talk, in any app

Free / Open-sourceVoice typing that works in every app and website
Free / Open-sourceVoice typing that works in every app and website

Free / Open-sourceSpeak naturally, get polished text anywhere you write
Free / Open-sourceSpeak naturally, get polished text anywhere you write
Free / Open-sourceDon’t type, just speak — AI voice dictation 4x faster than typing
Free / Open-sourceDon’t type, just speak — AI voice dictation 4x faster than typing

Free / Open-sourceTurn rough speech into polished, send-ready text on any device
Free / Open-sourceTurn rough speech into polished, send-ready text on any device

Free / Open-sourceSpeak naturally, get polished and structured text anywhere on your desktop
Free / Open-sourceSpeak naturally, get polished and structured text anywhere on your desktop