Estimated monthly cost comparison — not just the headline price
Prices change often — confirm on the vendor's site before buying. Report incorrect pricing →
Quick Take
Slack has the lower estimated monthly cost (~95%)
Based on advertised price plus documented recurring fees, not your exact usage.
Best for Slack
Teams prioritizing async messaging and quick ad-hoc calls over formal video meetings
Best for Zoom
Teams needing robust video conferencing, webinars, and phone systems for client-facing calls
Team messaging and collaboration hub. Free plan has a 90-day message history lim...
Advertised
$0
/month
Estimated monthly cost
$8
/month (illustrative)
90-Day Message History Limit
Free plan deletes message access after 90 days. Your team's entire knowledge base disappears quarter...
Per-User Cost at Scale
A 100-person company on Pro pays $875/mo ($10,500/yr). Business+ is $1,250/mo ($15,000/yr). The per-...
Slack Connect External Channels
Connecting with external organizations requires Pro ($8.75/user/mo) minimum. Free plan has no extern...
$7/mo annual
Video conferencing and collaboration platform. Free plan has a 40-minute meeting...
Advertised
$13.32
/month
Estimated monthly cost
$161.32
/month (illustrative)
40-Minute Free Meeting Limit
Free plan limits group meetings (3+ participants) to 40 minutes. Meetings cut off abruptly. Must res...
Zoom Phone Add-On
Zoom Phone (VOIP) is NOT included in any Workplace plan. Metered at $10/user/mo or Unlimited at $15/...
Zoom Rooms Add-On
Conference room hardware/software integration costs $49/room/mo. A 10-room office adds $490/mo. Hard...
Webinar & Events Add-On
Zoom Webinars start at $79/mo/license (500 attendees). Zoom Events at $99/mo. These are per-license,...
Cloud Recording Storage
Workplace Business includes limited cloud storage. Additional storage packs cost extra. Heavy record...
Slack is messaging-first with Huddles for quick calls. Zoom is video-first with Team Chat for messaging
Slack Pro at $8.75/user/mo vs Zoom Workplace Business at $13.32/user/mo — Slack is 34% cheaper
Slack Huddles support up to 50 people (Pro) for spontaneous calls. Zoom meetings support up to 300 for scheduled meetings
Most remote teams need both — Slack for async messaging and Zoom for formal meetings, doubling costs
| Metric | Slack | Zoom | Winner |
|---|---|---|---|
| Advertised Price | $0/mo | $13.32/mo | Slack |
| Estimated Monthly Cost | $8/mo | $161.32/mo | Slack |
| Recurring Extra Fees | +$8/mo | +$148/mo | Slack |
| One-Time Costs | $0 | $0 | — |
| # Documented Fees | 3 | 5 | — |
| Pricing Tiers | 4 | 4 | — |
| Affiliate Program | No public affiliate program | No public affiliate program | — |
Slack advertises $0/mo and Zoom advertises $13.32/mo. Slack has 3 documented extra fees (recurring: +$8/mo), while Zoom has 5 (recurring: +$148/mo). On these illustrative assumptions, Slack has the lower estimated monthly cost (about 95% less). Your real cost depends on seats and usage — use the calculator for your numbers.
Slack has 3 documented extra fees: 90-Day Message History Limit, Per-User Cost at Scale, Slack Connect External Channels. Recurring fees add roughly $8/mo on top of the $0/mo advertised price.
Zoom has 5 documented extra fees: 40-Minute Free Meeting Limit, Zoom Phone Add-On, Zoom Rooms Add-On, Webinar & Events Add-On, Cloud Recording Storage. Recurring fees add roughly $148/mo on top of the $13.32/mo advertised price.
Choose Slack if: Teams prioritizing async messaging and quick ad-hoc calls over formal video meetings. Choose Zoom if: Teams needing robust video conferencing, webinars, and phone systems for client-facing calls. The right choice depends on your team size, usage volume, and which features you need most.
This comparison is compiled from public vendor pricing pages and documentation. It uses illustrative assumptions (see "Cost Comparison Summary"), not your exact seats or usage, and vendor prices change often. Confirm current prices on each vendor's site, and use our calculator with your own usage for a closer estimate. Spotted an error? Email hello@trulycritic.com.
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