Curated list of the most cost‑effective unified communications platforms that give startups robust voice, video, chat, and collaboration tools without breaking the bank.
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All‑in‑one cloud phone system with video meetings, team messaging, and integrations; starter plan under $20/user/month.
VoIP phone service built on Zoom’s video platform; includes call routing, voicemail, and SMS for as low as $15/user/month.
Chat, video, and voice calling integrated with Office 365; free tier for up to 300 users, paid tier at $5/user/month for full PBX features.
Secure chat, video meetings, and Google Voice integration; starts at $6/user/month with 24/7 support.
Unified voice, video, chat, and contact center; starter plan includes unlimited domestic calling for $12/user/month.
AI‑enhanced cloud phone system with video conferencing and messaging; plans begin at $15/user/month.
Enterprise‑grade UC with voice, video, messaging, and screen sharing; flexible pricing starting around $14/user/month.
Integrated chat and VoIP via Zoho PhoneBridge; free chat tier, voice add‑on starts at $8/user/month.
Unified communications suite with phone, video, and team chat; entry plan at $20/user/month with unlimited calling.
Combined phone, video, and messaging platform; basic plan offers unlimited US/Canada calling for $19.95/user/month.
Scalable cloud PBX with integrated video and chat; starter tier around $15/user/month for up to 10 users.
Full UC suite with voice, video, messaging, and CRM integrations; plans begin at $19.99/user/month.
Open‑source chat combined with self‑hosted Asterisk PBX; free core software, only hosting costs (often <$10/month on cheap VPS).
Self‑hosted Slack alternative paired with Twilio programmable voice; low‑cost pay‑as‑you‑go voice usage, ideal for bootstrapped startups.