
Otter.ai
AudioPen
Speech to Note
TalkNotes
Notta.ai
Sonix.ai
Vocova.app
Convert any speech to clear and structured text

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Which is more popular?
Based on our record, Letterly.app seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | letterly.app | opalstack.com |
| Pricing | — | |
| Platforms | — | |
| Company | 2023 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Letterly is a mobile app that converts any speech into clear & well-structured text using AI technology. It goes beyond mere transcription by enabling users to easily rewrite their speech into structured notes, engaging social media content, concise meeting summaries, formal emails, and so...
No description of Opalstack yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Letterly.app yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Letterly.app and Opalstack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Use it mainly to turn my thoughts into notes and messages. Saves me a lot of time. And helps me not to delay when I need to write smth.
We have no reviews of Opalstack yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


We’ve just launched Letterly.app, that’s why haven’t integrated push notifications, authentification (for email) and social media. Source: almost 3 years ago
Tracking Opalstack since Sep 2023.
When comparing Letterly.app and Opalstack, you can also consider the following products.

Your AI meeting assistant that takes live notes and generates summaries and other insights using Meeting GenAI.
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The easiest way to convert messy thoughts into clear text
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Experience the power of our AI-driven tool as it instantly transforms your spoken words into a concise and informative summary!
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Create transcripts, blog posts, video scripts & more. Just talk casually and let the AI handle the rest! Works in 50+ languages.
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Automatically turn audio into editable, searchable and sharable text. Notta helps unleash the power of voice and brings your productivity to the next level.
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Automatically convert audio & video to text in minutes
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