Mitto is a communications provider based in Zug, Switzerland, working in A2P messaging since 2013. It sells pay-as-you-go messaging for brands worldwide through APIs, a campaign manager and a shared inbox called Mitto Conversations.
Pay as you go, with rates by country shown in a calculator on the pricing page. WhatsApp is billed at Meta's rate plus €0.0045 per message, or with a €0.0450 fee per monthly active user. Viber has a minimum monthly commitment by country. A free signup is offered.
Mitto has no iMessage. Both offer SMS and RCS. Mitto adds WhatsApp, Viber, Telegram and outbound voice, while Linq's WhatsApp API is in beta and its API only forwards inbound calls. Mitto bills per message, while Linq charges a flat monthly fee from $260 with no per-message fees.
Brands that send OTPs, alerts and campaigns in many countries across SMS, RCS and chat apps from one account.