What is Sundae?
Sundae is a personal assistant you reach by text message: iMessage, RCS or WhatsApp, with no app and no account to set up. Each user gets their own cloud computer, with a browser, files and memory, running on servers in Germany. You send a text, a voice note or a photo; Sundae opens websites, compares options and replies with the result and a screenshot.
It shops, finds restaurant tables and flights at current prices, reads letters you photograph, sets reminders and watches prices on a schedule. Before it spends money, sends anything to someone else, deletes anything or opens an account, it asks first. At checkout it normally hands the browser to you through a private link that stays open for 15 minutes, and you type your own card details.
Sundae is made by Sundae Bar AI PLC, a company registered in England and Wales, and is in beta with a waitlist. Its terms say it may make mistakes, lose data or take actions you did not intend, and that you must be at least 18.
Is Sundae worth it?
Booking a table for four on Friday, or finding the cheapest direct flight to Malaga, means a pile of tabs, filters and pop-ups. It is exactly the kind of chore you would hand to a friend if you had one with free time.
Sundae is that friend over text. You message it, it does the clicking in a browser on its own computer, and it texts back the options with its pick. In the site's demo it compares 3 morning flights from London and stops at the checkout. Bigger jobs run in the background and come back as one message when done.
The money handling is careful. By default you enter card details yourself through a link that expires after 15 minutes, and Sundae says it never records them. An experimental Vault can store a card and pay after you approve on your phone, with a per-purchase limit that defaults to US $100. The terms are blunt that there is no daily or monthly cap, so several $90 purchases in a row would all go through, and that Sundae cannot cancel or refund anything with a shop.
The catch: the privacy policy, version 1.0 from 6 November 2026, still contains drafting notes, including "[Confirm before publication, per provider: that the provider does not use our data to train its models...]" and retention periods left in square brackets. Sundae itself may train or fine-tune models on conversation data, with direct identifiers removed where practicable, and staff can read chats when troubleshooting. Sites you log into through its browser stay logged in.
Our take: treat Sundae like a new assistant on probation. Give it the research and the comparison, keep your card in your own hands, and wait for a finished privacy policy before you let it remember much about you.
Where it earns its place
A couple in London planning a weekend away
Find a direct morning flight under a set budget and book it
Text the dates and budget; Sundae compares fares, recommends one and takes it to checkout, where you open the private link and type your card. Nothing is bought until you say so.
A busy parent who loses letters and deadlines
Work out what a parking charge or school letter actually asks for
Photograph the letter and text it; in the site's example Sundae explains a £35 parking charge rising to £70 and the 28-day appeal window, then can set a reminder.
A shopper waiting for a price drop
Buy headphones when they fall below a target price
Ask Sundae to watch the price on a schedule; each check counts toward the free daily allowance, and it texts you when the price hits your number rather than buying on its own.
Before you commit
- Setup
- Text the number on sundae.md from iMessage, RCS or WhatsApp; there is no app or account, though beta demand means you may be waitlisted.
- Integrations
- Any website its browser can reach; you log in once and the session stays. Direct email and calendar connections are listed as coming soon. Language models are hosted by Fireworks AI (Kimi K3, DeepSeek Flash and MiniMax M3 at launch).
- Data and privacy
- Conversations are stored and used to run and improve Sundae; the policy says it may train or fine-tune models on conversation data after removing direct identifiers where practicable, and you can object. Card numbers, codes and passwords are removed where detected; a redacted admin log is kept 30 days. A scrambled version of your phone number is sent to Meta and X for ad measurement. Which AI tools train on your data?
- Cost at scale
- Not published: the Plus price is only shown by texting "billing", and background jobs and price checks draw down the same daily allowance.
- Limits
- Beta; the terms say it can misread a page, pick the wrong item or miss a fee. Vault spending limit is US $100 per transaction by default with no aggregate cap. Not for anyone under 18.
What’s good
- Works over iMessage, RCS or WhatsApp with nothing to install
- Asks before paying, sending, deleting or opening an account
- By default you type card details yourself in a 15-minute link
- Separate cloud computer per user, hosted in Germany
- Free daily allowance with no card
What’s not
- Plus price not published before you sign up
- Privacy policy still has unfilled drafting notes
- May train on conversations; staff can read chats
- Vault limit is per purchase, with no daily cap
- Beta with a waitlist; actions with shops cannot be reversed
Best for
Curious iPhone or Android users in the UK who want someone to do the comparison shopping and booking research by text, and are happy to press pay themselves.
Sundae alternatives
Sundae: common questions
- Is Sundae worth it?
- Sundae has the right instinct about money, stopping at checkout and letting you type the card, but it is a beta with an unfinished privacy policy and you cannot see what Plus costs before you start. We rate it 3.1 out of 5.
- How much does Sundae cost?
- Free to start with no card, with a daily allowance that resets at midnight your time. Plus is a paid monthly plan with a larger allowance, and extra credits can be bought; prices are not published on the site (text "billing" to see them).
- What are the downsides of Sundae?
- Plus price not published before you sign up; privacy policy still has unfilled drafting notes; may train on conversations; staff can read chats; vault limit is per purchase, with no daily cap; beta with a waitlist; actions with shops cannot be reversed.
- Who is Sundae best for?
- Curious iPhone or Android users in the UK who want someone to do the comparison shopping and booking research by text, and are happy to press pay themselves.
- How much does Sundae cost for a team or in production?
- Not published: the Plus price is only shown by texting "billing", and background jobs and price checks draw down the same daily allowance.
- Is Sundae safe for company data?
- Conversations are stored and used to run and improve Sundae; the policy says it may train or fine-tune models on conversation data after removing direct identifiers where practicable, and you can object. Card numbers, codes and passwords are removed where detected; a redacted admin log is kept 30 days. A scrambled version of your phone number is sent to Meta and X for ad measurement.
- What are the best Sundae alternatives?
- The closest alternatives we have reviewed are Meta Muse, OpenAI dots, Manus and Claude in Chrome.
Answers checked Nov 11, 2026.