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ThreadBridge vs SlackBridge
SlackBridge is the closest thing to a direct competitor: the same two platforms, and the same shape of customer — an agency, consultancy, or vendor on Slack, bridging into a client's Microsoft Teams, where the client's IT administrator approves a Microsoft consent screen without ever becoming a customer of the bridge. ThreadBridge works the same way, in either direction: connect your own Slack or your own Teams tenant — whichever side you're setting this up for — and send the other side a one-click approval link. They're never asked to create an account here, no matter which platform they're on.
| ThreadBridge | SlackBridge | |
|---|---|---|
| Pricing | Free for 1 connection; then $39/month per connection with unlimited channel pairs | Free (1 org, 1 channel); Pro $49.99/month (2 orgs, 5 channels), plus $10/month per extra org and $5/month per extra channel |
| Setup / permissions | Two flows: Guided (auto-discovers channels, needs a tenant-wide channel-listing permission) or Secure (narrower scope, manual team and channel ID entry) | Two flows: Guided Setup (10 permissions, automated) or Secure Connect (6 read-mostly permissions, manual bot install) |
| Who can start the bridge | Either side — whoever connects a platform first becomes the paying account, and the account's own dashboard offers both an OAuth sign-up (no password) and a plain sign-up form | Assumes the Slack-side customer always sets up and pays; SlackBridge's own site doesn't describe a Teams-first path |
| Files | Not relayed | Name and type announced by default; full file relay only once both admins opt in |
| Infrastructure | A dedicated, supervised process per bridge | Claims a 100% serverless architecture (Cloudflare Workers) |
| Message content | Never stored — see how ThreadBridge handles security | Claims no message content is stored; retains metadata for up to 7 days |
| Message-ID retention | 30 days, for duplicate-delivery detection | Up to 7 days, per SlackBridge's own site |
Where SlackBridge is ahead today
SlackBridge relays files, opt-in once both admins approve it, and ThreadBridge doesn't relay files at all today. That's a real gap if file sharing between the two platforms matters to how your team works.
Where ThreadBridge is ahead
SlackBridge's per-org and per-channel add-ons add up once you're running more than a couple of client relationships. ThreadBridge charges one price per connection, with no per-seat or per-channel add-ons: $39/month covers a connection and every channel on it, with nothing to meter as you add channels. And ThreadBridge now matches SlackBridge's reduced-scope option: choose Secure setup and skip the tenant-wide channel-listing permission entirely, the same trade-off SlackBridge's Secure Connect offers.
ThreadBridge also doesn't assume the Slack side is always the one paying. Whichever organization sets up a bridge owns the account and the bill; the other side is only ever asked for a one-click platform approval, whether that's Slack or Teams. SlackBridge's marketing is written entirely around the Slack-side-pays shape — there's no equivalent path described for a Teams-side company that wants to be the one setting things up.
Verified against SlackBridge's own site on September 6, 2026. Pricing and features change; confirm anything decision-critical directly with SlackBridge before you rely on it.