8x8 vs Slack
Compare 8x8 and Slack on features, pricing, and buyer fit using the same researched criteria.
8x8
Global UCaaS + contact-centre platform (8x8 Work / X Series) — Work X2 research floor ~$24/user/month annual; CC tiers custom/higher.
Best for
- • Mid-market and enterprise teams needing global UCaaS with a contact-centre path
- • Organisations shortlisting RingCentral-class peers for multi-country voice + meetings + chat
- • Buyers who want analytics/quality management inside the communications platform
Starting from $24.00/user/mo
No free plan
VS
Our verdict
No universal winner. Choose based on which criteria matter most for your team.
8x8 is better for
- ✓ Number / country coverage
- ✓ Power dialer
- ✓ WhatsApp Business
- ✓ Routing & IVR
Slack is better for
- ✓ CRM / CTI integrations
Tie
- • AI features
Choose 8x8 if: Mid-market and enterprise teams needing global UCaaS with a contact-centre path
Choose Slack if: Knowledge-worker teams that need channel-based team messaging as the primary collaboration hub
Slack
Channel-based team messaging platform — Free $0, Pro $7.25/user/month annual, Business+ $15, Enterprise+ contact sales; huddles for light video, not a phone system.
Best for
- • Knowledge-worker teams that need channel-based team messaging as the primary collaboration hub
- • Organisations that want a freemium chat workspace with a deep app ecosystem
- • Salesforce-centric companies aligning chat with CRM workflows
Starting from $7.25/user/mo
Free plan available
8x8 vs Slack pricing
8x8 researched starting price from $24/mo. Slack researched starting price from $7.25/mo; a free plan is researched. Affiliate economics excluded.
8x8
From $24.00/user/mo
Slack
From $7.25/user/mo
8x8
Starting from $24.00/user/mo
Free trial available
- Express$15.00/user/mo
- From ~$15/user/month annual (medium confidence) — lighter VoIP entry before full Work X2 packaging.
- Work X2Popular$24.00/user/mo
- From ~$24/user/month annual (medium confidence). Core 8x8 Work UCaaS — cloud phone, video, team chat, multi-country calling envelope.
- Work X4$44.00/user/mo
- From ~$44/user/month annual (medium confidence). Advanced analytics, quality management and speech analytics versus X2.
- Contact Center (X6–X8)Custom
- Separate contact-centre ladder commonly cited ~$85–$140/user/month — quote-based; not used as the Work X2 scored floor.
Slack
Starting from $7.25/user/mo
No free trial evidenced
- Free$0.00/user/mo
- $0 — limited message/file history and core channel messaging. Primary evaluation path (no published free trial on paid plans).
- ProPopular$7.25/user/mo
- $7.25/user/month billed annually ($8.75 monthly). Unlimited message history, huddles, canvas and core productivity features for growing teams.
- Business+$15.00/user/mo
- $15/user/month billed annually ($18 monthly). Stronger admin, compliance and AI assistance versus Pro.
- Enterprise+Custom
- Contact sales for Enterprise+ security, compliance and large-org controls.
Estimate your team cost
Monthly estimate from verified per-seat list pricing. Confirm on the vendor site before purchasing.
8x8
$360.00/mo
Slack
$108.75/mo
+$251.25/mo — 8x8 costs more
Verified monthly unit prices · Aug 17, 2026
Prices in USD
Shown per user / month from verified list pricing.
Plans can change
Confirm live vendor rates before purchasing.
Add-ons may apply
Calling, SMS, or usage fees can add cost.
Independence
Affiliate status never changes pricing outcomes.
Some visit links may be affiliate links — we may earn a commission at no extra cost to you. Comparison outcomes are never based on commission.