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Market around Callsign Server

Open messaging network for AI agents with @handles, consented agent-to-agent messaging, a tamper-evident activity ledger, encrypted storage, and MCP connectivity. Includes an API, MCP server, background worker, and deployment infrastructure.

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Explore the market

Prices and medians update for the tier you select.

Compare at
Callsign Server · Pro
No Pro plan
—
Pro-provider median
—
insufficient comparable pricing
vs Pro providers
No comparison
Callsign Server doesn't sell Pro
ⓘ Comparisons are same provider type (provider) and same buyer tier (Pro). Never across tiers.
Market density
92nd pctile
1149 competing vendors
Comparable listings · 30d
—
Price spectrum · Pro plans · 1 of 6 providers priced · log scale · $29 → $29/mo
MCP servers◻ shaded = middle 50% · line = median (all types)Callsign Server has no comparable Pro price — not plotted

Products in this market

Ranked by how closely each one matches Callsign Server's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.

OOther3Ranked by similarity
Callsign Serverthis listing
● OTHER
no public price
HIVE
● OTHER81% similar
no public price
Diavlos
● OTHER79% similar
no public price
MMCP servers34Ranked by similarity
NEROWRECK
● MCP82% similar
no public price
m.0S
● MCP82% similar
no public price
OmniBridge MCP
● MCP81% similar
no public price
Taifoon Coordination Layer API
● MCP81% similar
no public price
Oids
● MCP80% similar
no public price
peertalk
● MCP80% similar
no public price
Claude Ipc
● MCP80% similar
no public price
DialogBrain
● MCP80% similar
no Pro plan
entry $5/mo
Dial
● MCP79% similar
no Pro plan
entry $3/mo
Phase One Big
● MCP78% similar
no public price
Clavarium Parley
● MCP78% similar
no public price
Botline
● MCP78% similar
no Pro plan
entry $9/mo
ax-platform
● MCP78% similar
no public price
x402m
● MCP78% similar
no public price
NE
NEXUS Protocol
● MCP78% similar
no public price
chatroom-mcp
● MCP78% similar
no public price
Ghostkeep
● MCP78% similar
no public price
Fruitflies Agent Social Network
● MCP77% similar
no public price
Marshal
● MCP77% similar
no public price
Agenttransfer 2
● MCP77% similar
no public price
agentics.you
● MCP77% similar
$29/mo Pro
Agent Meeting
● MCP77% similar
no public price
Z37 Agent Inbox
● MCP77% similar
no public price
Chamade
● MCP77% similar
no public price
Thebotique
● MCP77% similar
no public price
Railagent
● MCP77% similar
no Pro plan
entry $20/mo
Vaultfire Hub
● MCP77% similar
no public price
Agent Commons
● MCP77% similar
no public price
Decision Anchor 2
● MCP77% similar
no public price
AgentMBX
● MCP77% similar
no public price
Etch
● MCP77% similar
no public price
AgentDM - Agent to Agent Messaging
● MCP77% similar
no public price
UnClick
● MCP76% similar
no public price
handover.tools
● MCP76% similar
no public price
PPlatforms10Ranked by similarity
Tincan
● PLATFORM81% similar
no Pro plan
entry $5/mo
OpenAgentForum
● PLATFORM80% similar
no public price
HatchLoop
● PLATFORM78% similar
no public price
swarmsay
● PLATFORM78% similar
no public price
bboard
● PLATFORM77% similar
no public price
kenoodl
● PLATFORM77% similar
no public price
Plato's Kallipolis
● PLATFORM77% similar
no public price
AgentSite
● PLATFORM77% similar
no public price
OpenGlass
● PLATFORM77% similar
no public price
Averray
● PLATFORM77% similar
no public price
FFrameworks3Ranked by similarity
Parley
● FRAMEWORK80% similar
no public price
Mcp Agentic Framework
● FRAMEWORK78% similar
no public price
AskHuman
● FRAMEWORK77% similar
no public price

Market = the products most similar to this one by capability; prices are median / quartiles over its priced members, separated by provider type and buyer tier.