The Problem: Two Platforms, One Conversation

Your sales rep lives in Slack. Your enterprise prospect lives in Microsoft Teams. The deal is moving fast, but every message requires a manual relay. Someone has to copy the conversation into an email, paste it into the other app, or schedule yet another call just to share context that should have flowed automatically.

This is not a rare edge case. It is the default state of modern B2B collaboration. Companies standardize on different platforms, and no one wants to abandon the tool their entire organization has already adopted. The result is friction - and friction kills deals, slows support, and frustrates partners.

Webhooks and bots exist as a workaround, but they introduce their own problems. Webhooks post messages as a generic bot account, stripping attribution and breaking the conversational feel. Bots require developer time to set up, maintain, and debug. They often break when platforms update their APIs. And neither approach gives you the native, seamless experience that makes communication feel natural.

Why Webhooks and Bots Fall Short

When a Slack webhook posts a message to Teams, it appears as "Incoming Webhook" or some generic bot name. The message lacks context about who sent it. Replies in Teams do not flow back to Slack. You end up with a one-way pipe that is better than nothing, but far worse than a real connection.

Bots have more capability but require significantly more setup. You need to write code, host infrastructure, manage OAuth tokens, and handle rate limits for two different platforms simultaneously. A developer might spend days building something that breaks the next time Slack or Teams ships an API update.

There is also the matter of data. Both webhooks and most bot implementations log messages or route them through third-party servers. For any organization that handles sensitive conversations - sales discussions, support tickets, M&A details - this is a real compliance risk.

How TetherChat Works

TetherChat takes a fundamentally different approach. Instead of a generic relay, it operates as a native application on each platform. On Slack, it is a proper Slack app installed from the App Directory. On Teams, it is a proper Teams app installed from the Microsoft App Store.

This native approach means messages appear with real user attribution. When a Slack user sends a message, it appears in Teams with their name and profile picture attached - not a bot. The conversation feels continuous and natural even though it spans two completely different platforms.

Setup takes under five minutes:

Step 1 - Install on Slack. Go to the Slack App Directory and add TetherChat to your workspace. A workspace admin approves the installation and grants the necessary permissions.

Step 2 - Create a Tether. In the Slack channel you want to connect, type /tether. Choose "Create New Tether" from the menu. You will receive a unique Tether ID - a short code that identifies this connection.

Step 3 - Connect from Teams. Install TetherChat from the Microsoft Teams App Store in your Teams channel. When the setup screen appears, paste the Tether ID from Slack. The two channels are now connected.

From this point forward, every message sent in the Slack channel appears natively in the Teams channel, and every message sent in Teams appears in Slack. No additional steps. No maintenance. No developer required.

Real Use Cases

Sales teams use TetherChat to stay in Slack while their enterprise prospects stay in Teams. The prospect never needs to install a new app, sign up for an account, or change their workflow. Proposals, questions, follow-ups, and negotiation details stay in a single bridged conversation that both sides see in their preferred platform.

Customer support organizations use TetherChat to connect internal support channels with the channels where their customers already live. A support rep working a Slack queue can respond directly to a Teams customer without switching apps or asking the customer to change their habits. Resolution times drop because friction drops.

Cross-company partnerships - especially during M&A due diligence, joint ventures, or long-term vendor relationships - use TetherChat to connect the two organizations without IT projects or platform migrations. Both sides keep their existing workspaces and tooling. The connection is channel-level and scoped, so sensitive conversations stay within the channels you intend to bridge.

Frequently Asked Questions

Does TetherChat store my messages?

No. TetherChat does not persist message content. It operates as a transient relay - messages pass through in real time and are never written to disk. The only exception is a temporary encrypted buffer used during platform outages (such as a Slack or Teams service disruption), which is cleared immediately once delivery succeeds.

What message types does TetherChat support?

TetherChat transmits text messages and emoji reactions sent by human users. Files, images, and attachments are not currently transmitted. Messages from other bots and integrations are not relayed - only direct human messages flow across the bridge.

Get Started

TetherChat is free during beta with no credit card required. If your team is losing deals, slowing support, or struggling with cross-company collaboration because of the Slack-Teams divide, there is no reason to wait.

Install TetherChat in your Slack workspace today and have a working bridge set up before your next customer conversation.