EmailStorm vs Stamp Mail
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EmailStorm
This app helps you find the right contact information for important people, even if you don't have their email address. It generates a smart email list using available data, saving time for cold outreach or reconnecting with contacts.
- Smart email list generation
- Find contact information
- Save time on outreach
- Improve contact results
- Reconnect with contacts
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EmailStorm takes the guesswork out of getting in touch with important people when you don’t have their email address. By generating a smart email list using information you do have, EmailStorm saves you time and helps you get better results whether you are making cold calls or reconnecting with old friends.
Stamp Mail
This AI-powered email client automates tasks like drafting replies, prioritizing messages, and extracting to-dos. It offers an agent to retrieve information and reorganize your inbox using plain English commands. A special mode allows quick review and approval of automated changes.
- Automated email drafting
- Email prioritization
- To-do extraction
- Email summarization
- Information retrieval via AI agent
- Inbox reorganization
- Approve/reject agent changes
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Stamp is the AI Email Client that handles your emails for you. Stamp can automatically draft replies, prioritize important emails, extract todos, generate summaries, and more! With Stamp Agent, you can retrieve important information, reorganize your inbox, or perform any other action in plain English. What's more, with Stamp Mode you can quickly swipe through changes the agent made while you were gone, approving or rejecting them. Get started today, and experience what it's like to have your own AI personal secretary. Privacy Policy: https://www.stampmail.ai/privacy Terms of Use: https://www.stampmail.ai/tos
Screenshots
Verdict
The clearest difference is rating: Stamp Mail at 5.0 against EmailStorm's 3.5. Stamp Mail also leads on update cadence (every 2 weeks vs every 11 months) and iOS requirement (15.1 vs 26.0). On price, ratings volume, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. EmailStorm sells 1 one-off in-app purchase and Stamp Mail sells 4 in-app purchases, starting at $20.00 per month. Whichever you choose, the download price is not the number that matters.
Stamp Mail holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
EmailStorm ships an update every 11 months, Stamp Mail every 2 weeks. The most recent releases landed on September 9, 2026 and July 4, 2026 respectively.
| Parameter | EmailStorm | Stamp Mail |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (2 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Olga Volkova | Stamp AI, Inc. |
Customer experience
EmailStorm
Stamp Mail
In-app purchases
EmailStorm
- Remove ads$1.99
Stamp Mail
- Stamp Individual (Monthly)7 Days trial$20.001 Month
- Stamp Business (Monthly)7 Days trial$50.001 Month
- Stamp Individual (Annual)7 Days trial$191.991 Year
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- Stamp Business (Annual)7 Days trial$479.991 Year
