Your team's chat tool is probably the most-used app in your company. More than your IDE, more than your CRM, more than your project management tool. It's where decisions happen, context lives, and culture forms. Picking the wrong one means daily friction for every person on your team.
Slack defined modern workplace chat. Discord was built for gamers but has been quietly adopted by developer communities and startups. Microsoft Teams comes free with Office 365 and has eaten the enterprise market through distribution. Three very different philosophies, three very different experiences.
The Short Answer
Tech startup or SaaS company? Slack. Community-driven team or dev-heavy org that values voice? Discord. Enterprise already on Microsoft 365? Teams — fighting it is harder than using it.
Pricing
Slack
- Free: 90-day message history
- Pro: $8.75/user/month
- Business+: $12.50/user/month
- Enterprise Grid: custom pricing
- Free tier is hobbled by history limit
Discord
- Free: unlimited messages (!)
- Nitro: $10/user/month (optional)
- No per-seat business pricing
- Unlimited message history free
- Absurdly cheap for what you get
Microsoft Teams
- Free: basic features
- Essentials: $4/user/month
- Business Basic: $6/user/month
- Included with M365 Business ($12.50+)
- "Free" if you're already on M365
Real Cost
- 50-person team on Slack: ~$437/mo
- 50-person team on Discord: $0
- 50-person team on Teams: $0 (if on M365)
- Slack's cost is real but the ROI is too
- Discord's free tier is unreasonably good
Messaging Experience
Slack has the most polished messaging experience for work. Threads keep conversations organized, emoji reactions are a language unto themselves, and the search is genuinely good. Slash commands, workflows, and Canvas (for persistent docs) add layers of utility. The UX is refined from a decade of iteration.
Discord messaging is fast and fun but less structured for work. Voice channels (always-on rooms you can drop into) are Discord's killer feature — they replicate the "tap someone on the shoulder" office experience better than any other tool. Text channels lack threads by default (they exist but aren't as natural as Slack's). Forum channels are great for async discussions.
Teams messaging is... fine. It works, it has threads (sort of), and it integrates with Office 365. But the UX is clunky, search is mediocre, and the app is a resource hog. The chat experience feels like it was designed by committee — because it was.
Voice & Video
Discord has the best voice experience. Always-on voice channels mean you can "sit in a room" with teammates without scheduling a meeting. Screen sharing, Go Live (stream your screen), and noise suppression are excellent. For remote teams that miss the office energy, Discord voice is transformative.
Teams has the most robust video meeting platform — Teams Meetings is genuinely competitive with Zoom. Calendar integration, meeting recordings, transcripts, breakout rooms, and live captions. For companies that run on meetings (for better or worse), Teams delivers.
Slack has Huddles (quick audio calls with optional video) which are great for impromptu conversations. Slack Clips let you record short video messages. Full video conferencing isn't Slack's strength though — most teams pair Slack with Zoom or Google Meet.
Integrations
Slack has the deepest integration ecosystem for developer and SaaS tools. GitHub, Jira, PagerDuty, Datadog, Salesforce, Notion — everything has a Slack integration. The Workflow Builder lets non-technical users automate processes. For tool-heavy SaaS companies, Slack is the integration hub.
Teams integrates deeply with the Microsoft ecosystem — SharePoint, OneDrive, Power Automate, Dynamics, Azure DevOps. If your company runs on Microsoft, the integrations are seamless. Third-party integrations exist but aren't as polished as Slack's.
Discord has webhooks and bots (great for developer workflows) but lacks the polished app marketplace that Slack offers. You can integrate most tools via webhooks or custom bots, but it requires more technical effort.
Search & Knowledge
Slack's search is the best of the three — filter by person, channel, date, has:link, has:file. For teams that use Slack as a knowledge base (questionable but common), search is critical and Slack delivers. Canvas adds persistent documents to channels.
Teams search is frustratingly inconsistent. Sometimes it works great, sometimes it can't find a message you sent yesterday. Microsoft is improving it, but it's not there yet.
Discord search is basic but functional. Global search across servers, filter by user or channel. Adequate for finding things but not a knowledge management tool.
Administration & Security
Teams wins on enterprise administration. Azure AD integration, conditional access policies, DLP (data loss prevention), eDiscovery, and compliance certifications that enterprise IT departments require. If security and compliance are non-negotiable, Teams (backed by Microsoft's security infrastructure) is the safest bet.
Slack has solid enterprise features — Enterprise Grid offers multi-workspace management, SAML SSO, DLP integrations, and compliance exports. Enterprise Key Management (EKM) lets you control encryption keys. Adequate for most companies, but Microsoft has the edge for heavily regulated industries.
Discord has minimal enterprise administration. No SAML SSO, basic role-based permissions, no compliance tools. Fine for startups and communities, but IT departments at larger companies will flag this as a risk.
Our Verdict
For SaaS companies and tech teams: Slack. The integration ecosystem, threading model, and search make it the best daily driver for knowledge-work teams. The cost is real but justified by the productivity gains.
For remote-first teams that value spontaneity: Discord. Always-on voice channels and the free unlimited messaging make Discord surprisingly effective for small, scrappy teams. Perfect for startups under 30 people who want office energy without office overhead.
For enterprises on Microsoft 365: Teams. If you're already paying for M365, Teams is free and deeply integrated. The UX isn't great, but the admin features, compliance, and meeting capabilities make it the pragmatic choice for large organizations.