seven

Overview

seven, formerly sms77.io, is an SMS gateway in Kiel, Germany, founded in 2003. It sells pay-as-you-go messaging through a web app, email to SMS and a REST API, and holds ISO/IEC 27001:2022 certification.

Key features

• REST API for SMS, RCS, WhatsApp and text-to-speech voice calls, plus SMPP
• RCS with your own verified agent set up in the dashboard, and fallback to SMS or to an SMS with a link to a web view
• Inbound numbers bookable by API, and SIM hosting to use your own physical number
• Webhooks with optional request signatures
• HLR, MNP and CNAM lookups
• Hosted MCP server with OAuth, plus an npm package for local use
• SDKs, a CLI, and n8n and Zapier integrations

Pricing

Prepaid balance with no base fee. SMS is listed at €0.075, with some countries priced differently. WhatsApp costs €0.005 a message plus Meta's fees, voice from €0.015 a minute, and inbound numbers or SIM hosting from €19.90 a month plus €9.90 setup. New accounts get free test credit.

How it compares to Linq

seven has no iMessage, which is Linq's main channel. Both offer SMS and RCS with SMS fallback, and both have an MCP server. seven charges per message; Linq charges a flat monthly fee from $260 for Pro. seven sends WhatsApp through its main API, while Linq's WhatsApp is a separate beta.

Best for

European teams and agent builders wanting pay-as-you-go SMS and RCS.

Sources

• seven.io/en
• seven.io/en/prices
• seven.io/en/products/rcs
• seven.io/en/company
• seven.io/en/company/compliance-informationssicherheit
• docs.seven.io/en
• docs.seven.io/en/rest-api/endpoints/rcs
• docs.seven.io/en/rest-api/endpoints/numbers
• docs.seven.io/en/rest-api/signing
• docs.seven.io/en/mcp
• github.com/seven-io/seven-mcp