Grupo Ótima Digital is a Brazilian business communications company led by Thiago Oliveira, who founded its predecessor Otimatel in 2001. It has offices in São Paulo, Curitiba, Ituverava and Bauru, and is listed as a partner on Google's RCS for Business site. Its GOChat line covers RCS, SMS, WhatsApp, email, webchat and links; GOTalk covers voice; GOSolution adds bots and analytics.
No prices are published. The RCS page says you pay only for messages that are received. Quotes come through the sales team.
Ótima Digital has no iMessage. It offers RCS and SMS alongside WhatsApp and voice, aimed at Brazilian businesses and sold by quote. Linq sends iMessage, RCS and SMS from real phone numbers with automatic fallback through one public API, at a flat monthly fee from $260 on Pro.
Brazilian companies running collections, marketing and service campaigns across RCS, SMS, WhatsApp and voice.