ccMarvin vs TurnKeeper

Marvin watches every company you back, private or public, and delivers the signals that matter: exec changes, acquisitions, product releases, funding rounds. Straight to...

TurnKeeper is a fair Slack rotation app: round robin rotations, on-call rotation and standup rotation with an explainable, append-only ledger. EU-hosted, €19/month flat.

About ccMarvin

Marvin watches every company you back, private or public, and delivers the signals that matter: exec changes, acquisitions, product releases, funding rounds. Straight to your inbox. Research, summaries, planning help, and life analysis, delivered to your inbox. 2026-09-07, Teased the Grok 5 training run, "biggest cluster yet", and said the Cybercab line is running ahead of schedule. 2026-09-06, Essay follow-up: interpretability results are moving into production Claude models.

About TurnKeeper

TurnKeeper is a fair Slack rotation app: round robin rotations, on-call rotation and standup rotation with an explainable, append-only ledger. EU-hosted, €19/month flat. One Slack rotation app for support triage, code review, on-call handoffs, or to rotate your standup facilitator. It announces whose turn it is, skips absences with a visible reason, and can always explain itself. TurnKeeper records every turn, skip, swap and absence in an append-only ledger. When software decides whose turn it is, predictable is the whole feature.