Feature
A · Microsoft Teams
B · Slack
Winner
Starting price (INR/user/month)
Teams Essentials is significantly cheaper than Slack Pro. If you already pay for Microsoft 365 Business Basic (~₹145/user/month), Teams is included at no extra cost.
₹0 — free tier available; Teams Essentials ~₹145 (billed annually)
₹0 — free tier available; Pro plan ~₹535 (billed annually)
A
Free tier message history
Both free tiers limit history. Slack's 90-day window is more predictable for active teams; Teams' 10,000-message cap can fill quickly in busy channels.
Last 10,000 messages searchable
Last 90 days of messages searchable (changed from 10,000 message limit in 2023)
Tie
Video call participant limit
For all-hands meetings, town halls, or client demos with many attendees, Teams has a clear structural advantage.
Up to 1,000 participants (Teams Premium goes to 20,000 view-only)
Up to 50 participants (Slack huddles); Slack does not natively host large webinars
A
Third-party app integrations
Slack's directory is roughly 3–4× larger. If your stack includes niche Indian SaaS tools (Zoho, Razorpay, Leadsquared), Slack is more likely to have a native connector.
~700 apps in the Teams App Store
~2,600 apps in the Slack App Directory
B
Workflow automation (no-code)
For ops or HR teams that want to automate approvals or onboarding without IT help, Slack Workflow Builder is faster to set up.
Power Automate — powerful but requires some learning curve; separate Microsoft product
Workflow Builder built into Slack — easy to use, no separate login; triggers on Slack events natively
B
Microsoft 365 / Office integration
If your company runs on Microsoft Office, Teams removes a lot of context-switching. Slack's Office integration is functional but not seamless.
Native — Word, Excel, PowerPoint, SharePoint, OneDrive all embedded in Teams
Available via connector — works but is not native; editing Office files opens external windows
A
Mobile app experience (Android/iOS)
On budget to mid-range Android devices (₹10,000–₹20,000 price band), Slack's app tends to feel more responsive based on user reports.
Functional; some users report it feels heavier than Slack on mid-range Android devices
Generally faster and lighter on mid-range Android phones common in India
B
India-based data residency
For BFSI, healthcare, or government-adjacent companies with data localisation requirements, Teams has a clear compliance advantage.
Microsoft offers data residency in India (Pune/Chennai data centres) on eligible 365 plans
Slack (Salesforce) does not currently offer India-specific data residency; data stored in the US
A
Customer support (paid plans)
Microsoft's support network in India (partners, resellers, direct) is larger than Slack's. Useful if your team is not technically self-sufficient.
24/7 phone and web support on Microsoft 365 Business plans; dedicated account managers for enterprise
24/7 support on Pro and above; priority support only from Business+ plan (~₹1,070/user/month)
A
Search across files and messages
Slack's search is widely regarded as more precise for finding a specific conversation. Teams search improves with Microsoft Copilot add-on but that costs extra.
Powerful but search across SharePoint, Teams chat, and email can return cluttered results
Slack search is fast and channel-scoped; most users find it easier to find specific messages
B
AI / Copilot features
Both AI add-ons cost significantly more than the base product. Evaluate whether the use case (meeting notes vs. channel summaries) fits your workflow before paying.
Microsoft Copilot for Teams: meeting summaries, chat drafts, real-time transcription — costs ~₹2,500/user/month extra
Slack AI: channel summaries, thread recaps, search answers — costs extra; US$10/user/month add-on (no India INR pricing confirmed)
Tie
Best fit (summary)
Neither tool is universally better. The right pick depends on your existing stack and team type — see guidance below.
Companies already on Microsoft 365, needing large meetings, data residency in India, or strong Office integration
Companies with a mixed SaaS stack, developer or product teams, and a need for fast workflow automation
Tie
Pick A if…
Microsoft Teams
Pick Microsoft Teams if your company already pays for Microsoft 365 — you're effectively getting Teams at no incremental cost. It also makes sense if you run large all-hands meetings (200+ people), need India data residency for compliance, or rely heavily on SharePoint and OneDrive for document storage. Teams is a solid default for traditional industries like manufacturing, logistics, BFSI, and government-adjacent businesses where Microsoft is the standard IT stack.
Pick B if…
Slack
Pick Slack if your team is in tech, product, or consulting and connects with 10 or more external SaaS tools — Slack's integration depth will save you time every week. It's also the better choice if your ops or HR team wants to build approval workflows without raising an IT ticket. Startups, agencies, and remote-first companies tend to prefer Slack's faster interface and cleaner channel organisation, especially when the team is spread across time zones.
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Easexpense pulls usage from Google Workspace, Microsoft 365, AWS, Slack and Zoho. Read-only OAuth. Surfaces unused licences and tier mismatches on day one.
Start the free audit →₹ figures based on Microsoft and Slack published India pricing as of mid-2025; exchange rates and promotional pricing change frequently — verify current rates at microsoft.com/en-in and slack.com before budgeting.