Threads, which aims to create a user-friendly asynchronous chat platform for coworkers, comes out of stealth with $10.5M Series A from Sequoia
The rapid rise of Slack has ushered in a new wave of apps, all aiming to solve one challenge: creating a user-friendly platform where coworkers can have productive conversations.
Context & Ripple Effects
Threads enters a lane that has been forming since Slack itself absorbed the idea: Slack shipped its own threaded messages feature across all platforms in early 2017, conceding that linear chat rooms were not enough. Later that year, Todoist's team launched Twist, organizing every conversation into threads by design rather than as an add-on.
Threads' $10.5M Sequoia-led Series A lands alongside a second funded challenger on nearly the identical thesis — Quill, which raised its $2M Sam Altman-led seed and $12.5M Index-led Series A the same year. Two venture-backed async-first entrants in one cycle signals investors see Slack's real-time firehose as a durable wedge, not a solved problem.
First-order effects
- Sequoia now holds a direct position against Slack in team messaging, backing a product whose core premise — conversations organized as threads by default — attacks the structure of Slack's channels rather than its price.
- Teams evaluating workplace chat gain a credible third option built around asynchronous communication, alongside Twist and Quill.
Second-order effects
- Slack faces pressure to keep absorbing challenger features natively — the threading playbook it already ran in 2017 — rather than ceding the async segment to specialists.
- The clustering of Sequoia and Index capital around async chat invites more entrants and raises the bar for differentiation, pushing competitors toward sharper opinions on notification culture and response-time norms.
Third-order effects
- If the pattern holds, workplace messaging stratifies by communication style — real-time hubs like Slack versus async-first platforms — instead of converging on one winner, with buyers choosing per team workflow rather than per company.
- The crowded field also foreshadows consolidation: style-differentiated challengers either carve out durable niches or become acquisition targets as the incumbent platform extends its own feature set.
The trend: Team chat is splintering into style-differentiated challengers — async-first, focus-oriented — each betting that Slack's real-time channel model leaves structural room above it.