ringSMB vs MarkupBase

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

ringSMB compared with MarkupBase
Detail	ringSMB	MarkupBase
What it does	One business number across web, mobile, and SIP desk phones with AI answering and pay-as-you-go pricing	Review Markdown and HTML with people and AI agents
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	US
Pricing model	Paid	Not given
Pricing	Phone numbers: $3/month. Usage charges: inbound calls $0.02/min, outbound calls $0.03/min, web/mobile phone $0.01/min, forwarding $0.045/min, SMS $0.02/segment, AI receptionist +$0.18/min, recorded minutes $0.01/min, stored recordings $0.002/min, transcription $0.02/min, AI summaries $0.03 each, tex	Free plan: $0 with 25 artifacts (including 5 private), 250 MB storage, 1 active agent connection, 500 MCP write actions per month. Pro plan: $120/year (or $12/month) with 1,000 artifacts, 10 GB storage, 20 active agent connections, 25,000 MCP write actions per month. Enterprise pricing available by
Key features	Shared business phone number accessible from web, mobile, and SIP desk phones AI voice receptionist that answers calls and books appointments Business text messaging Call routing and IVR menus Appointment booking and calendar management Call recording and transcription Customer contact management with shared notes and history Lead pipeline and opportunity management Extensions and unlimited users per account AI call summaries and voicemail transcription	Versioned Markdown and HTML artifacts Contextual comments and immutable review history Review requests for people and AI agents Model Context Protocol (MCP) integration Safe HTML previews Permanent version history with revision tracking Private, unlisted, and public artifact visibility Support for multiple active agent connections Isolated preview for untrusted HTML Separate identities for people and agents
What makes it different	Pay-as-you-go pricing with no per-user seat fees or long-term contracts One professional number works across web, mobile, and SIP desk phones with synchronized context Built-in AI receptionist that handles common questions and transfers to humans when needed Integrated lightweight CRM and appointments without separate tools Number porting to bring existing business numbers to the platform	Immutable review history keeps every decision alongside the work MCP integration enables reliable agent handoffs without custom tool connections Humans retain final approval authority while agents work autonomously Comments carry forward across versions showing what changed and why Works across multiple agent systems and between agents and people over time
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	7 −1 (down) since last check
Trust Flow (Majestic)	2	0
Citation Flow (Majestic)	12	26
Referring domains (Majestic)	1	31

4 details filled in for both companies.

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