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Weekly · Comms · Week of May 25, 2026

Superhuman Mail MCP + Slack Block Kit, Deepgram, Help Scout | Messaging SaaS Recap 2026

Generated 6d ago

Superhuman ships Mail MCP, Slack adds Block Kit Alert/Card/Carousel and streaming chat methods, and Deepgram drops Diarization v2 — this week in communication-messaging SaaS.

Superhuman turned its inbox into an MCP server: Claude or ChatGPT can now search, draft, Smart Send, triage Split Inbox, and check read receipts in your personalized voice. Available on Business and Enterprise.

Slack shipped chat.startStream, chat.appendStream, and chat.stopStream alongside three new Block Kit primitives — Alert, Card, and Carousel — so in-channel agents can progressively render structured responses instead of dumping a wall of text.

Deepgram released Diarization v2 via a new diarize_model parameter, preferred 3.3× over v1 in side-by-side human evaluation. Help Scout shipped native SLAs with response and resolution targets surfaced on the conversation itself. Rocket.Chat 8.5.0-rc.0 moved the OAuth handshake server-side with PKCE/CSRF protection and added four new ABAC permissions.

Zoho Cliq made its MCP debut, letting assistants schedule meetings, triage tickets, and post follow-ups without touching the UI. Matrix announced the candidates for the 2026 Governing Board elections.

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Mentioned in this video: • Superhuman — Mail MCP server exposing Smart Send, Split Inbox, and Read Statuses as agent tools • Slack — Block Kit Alert/Card/Carousel blocks plus chat.startStream / appendStream / stopStream streaming methods • Deepgram — Diarization v2 batch speaker model via new diarize_model parameter • Help Scout — Native inbox SLAs with response and resolution time tracking • Rocket.Chat — 8.5.0-rc.0 with phishing-resistant OAuth, ABAC tab permissions, and SDK transport flag • Zoho Cliq — MCP server and Cliq developer platform for AI-powered workflows • Matrix — 2026 Governing Board election candidates announced

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More weekly communication-messaging SaaS recaps: https://sparkpulse.io/communication-messaging

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