Rattle, which lets sales teams integrate CRM apps like Salesforce inside Slack or Microsoft Teams, raises a $26M Series A led by Insight Partners
Shubham Sharma / VentureBeat :
Context & Ripple Effects
Rattle's raise lands on a decade-long arc of pulling CRM work into chat. Slack and Salesforce first built native integrations for sharing records and Chatter feeds back in 2016, and Salesforce then removed any ambiguity about who owns that surface by buying Slack outright for $27.7B in 2020.
Since then the layer has been contested from both sides: startups like Tact and Squelch raised money to make enterprise data conversational, while Slack itself moved upmarket with Sales Elevate, a paid $60-per-month Sales Cloud integration. Rattle's angle is neutrality — it serves both Slack and Microsoft Teams rather than being captive to the Salesforce-Slack stack.
First-order effects
- Insight Partners' $26M funds a vendor whose product now sits directly on top of Salesforce's own distribution channel — Rattle competes with Slack Sales Elevate for the same sales-team workflow dollars.
- Sales teams on Microsoft Teams gain a CRM integration path that Slack's owner has no incentive to prioritize, since Salesforce monetizes its own chat platform instead.
Second-order effects
- Microsoft Teams becomes the natural home for cross-platform CRM middleware: because Salesforce controls Slack, independent players like Rattle can differentiate by treating Teams as the neutral venue rather than the second-class client.
- Slack and Salesforce face pressure to keep bundling more of the sales workflow natively — as they did with Sales Elevate — to prevent third-party tools from capturing the integration margin between chat and CRM.
Third-order effects
- If the pattern holds, chat platforms consolidate as the default work surface for revenue teams, forcing a structural choice for every CRM vendor: absorb the interface themselves (the Salesforce-Slack route) or cede the front end to independent layers that span multiple messengers.
- The same dynamic that produced Tact, Squelch, and Rattle suggests a durable venture category — 'assistant as work surface' — where value accrues to whoever owns the conversational layer between workers and systems of record, regardless of which CRM sits underneath.
The trend: Enterprise messaging platforms are becoming the primary interface for CRM workflows, with platform owners building native paid integrations while venture-backed independents race to stay cross-platform and neutral.