Natter for Business terms

Placeholder terms — not yet reviewed by a lawyer.

These are the terms for the Natter Business API, offered by Masons Mail. Version 2026-10-18. By accepting them you agree to them on behalf of the business you name when you create it.

What you pay. The Natter Business API is free for now. It is intended to become a paid service at a planned price of €0.001 per message (one tenth of a cent), set only to cover running costs. We will confirm prices at least 30 days before any charges begin, and nothing you use before then will be charged. After that, outbound messages are billed at the price shown in your account at the time of sending, and inbound messages, which people send to your business, stay free. We will announce any later price change at least 30 days before it applies.

Who you may write to. You may only message a person who has written to your business in the last six months. The Natter server refuses messages outside that window. You may not send unsolicited marketing, and you may not buy, rent or import lists of people to message.

Opting out. When a person blocks your business or replies STOP, messaging that person ends at once. You must not try to reach them from another number or another business.

No marketing. Natter Business is for conversations your customers start. Marketing, promotions and unsolicited messages are not allowed. Selling is fine when the customer asked for it. Allowed: a reply about a product the customer asked about, with its price and a link to buy it; order and delivery updates; bookings; support; and account notices. Not allowed: promotions, offers, newsletters or re-engagement messages the customer did not ask for, especially when your business starts the conversation.

How we enforce it. Natter may automatically review messages a business starts (sent more than an hour after the customer's last message) using an automated system, and may monitor sending patterns such as sudden increases in volume. Natter does not randomly check your replies to customers and never checks personal chats. Messages that pass are not stored. Messages identified as marketing are not delivered and may be kept for up to 30 days so a person can review them and you can appeal; after that they are deleted. Repeated violations pause your account. Customers can also report a business to Natter Support.

Suspension, bans and closing. On breach of these terms your business may be throttled, paused, suspended or banned. Each action is emailed to your contact address with the reason. While paused or suspended, sends are refused and new customer messages are not accepted; messages accepted before then are held and not delivered to you while the pause or suspension lasts. A ban discards them. Refused sends are not billed. You can close a business at any time from its Settings page, by typing its name and your password. Closing takes effect at once: every API key is revoked, its numbers are released, sending stops, messages waiting for your webhook are discarded, and customers can no longer find or message it in the app. You can undo a close for 7 days; revoked keys and released numbers do not come back, so you create new keys and verify your numbers again. After 7 days the business's data on Natter is deleted, as described under Your data. Deleting your Masons Mail account closes all of its businesses the same way, without the 7-day undo. We may also close a business; the reason is sent to your contact address.

Confidentiality. Conversations between your business and its customers are not end-to-end encrypted. Natter's servers decrypt each customer message so that it can be delivered to your webhook, and receive each message you send in readable form before encrypting it for the customer's phone. While a message waits to be delivered, Natter keeps it encrypted with a server key for up to 24 hours; its content is deleted once it is delivered or that time runs out. Personal conversations between people on Natter are not covered by this; they are end-to-end encrypted and Natter cannot read them. Each customer message delivered to your webhook includes the customer's verified phone number, as the Natter app tells the customer before their first message to you.

Your data. We keep your account details, the business record, API key identifiers (never the key itself), usage rows and invoices for billing and for the audit trail. You can see all of it from your dashboard. When a closed business's 7-day undo period ends, we delete its data on Natter: its customer list and opt-outs, its side of each conversation, messages waiting to be delivered, media, webhook settings and delivery log, profile, appearance, settings, verification records, numbers and API keys. Customers keep the chat history on their own phones. Records we must keep by law (the Swedish Bookkeeping Act: seven years after the end of the year they belong to) stay without your contact details: priced usage, invoices, payments, and the business name, VAT number and country they name. Usage that cost nothing is deleted. A record that the business was closed, with its dates and how many records were deleted, stays for 90 days.

Appeals and questions. Reply to any email from us, or write to the contact address on the imprint page. We answer within a few working days.

Changes. When these terms change you will be asked to accept the new version. Until you do, a notice appears on every page of your business account. For 30 days from the date the new version takes effect nothing is restricted. After those 30 days, changes to your settings, keys and webhooks in your account are paused until you accept, and every response to an API request made with your keys carries the header Natter-Terms-Acceptance-Required with the version to accept. The API keeps working, and sending is not stopped by a terms change.