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Market around Countersign

Independent, signed check of AI work. Send a report, calculation, summary, filing draft or code; Countersign re-computes the arithmetic, looks up quotes in the cited sources, opens links, parses code, and returns a signed stamp: pass, fail or inconclusive, exactly what is wrong,

Visit countersign.llpro.ai ↗

Explore the market

Prices and medians update for the tier you select.

Compare at
Countersign · Pro
No Pro plan
—
Pro-agent median
—
insufficient comparable pricing
vs Pro agents
No comparison
Countersign doesn't sell Pro
ⓘ Comparisons are same provider type (agent) and same buyer tier (Pro). Never across tiers.
Market density
42nd pctile
96 competing vendors
Comparable listings · 30d
—
MCP servers · Pro median
$59/mo
4 priced · —–— mid 50%
Price spectrum · Pro plans · 6 of 8 providers priced · log scale · $9 → $399/mo
Agents MCP servers APIs◻ shaded = middle 50% · line = median (all types)Countersign has no comparable Pro price — not plotted

Products in this market

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

AAgents10Ranked by similarity
Countersignthis listing
● AGENT
no public price
AIﾉアカリ☆ Result Receipt Auditor
● AGENT75% similar
no public price
SkeptOpus
● AGENT74% similar
no public price
trustbut
● AGENT74% similar
no public price
Agent Countercheck
● AGENT72% similar
no public price
Skill Check
● AGENT72% similar
no public price
Klaub
● AGENT71% similar
no public price
Universal Agentic QA
● AGENT70% similar
no public price
antemortem
● AGENT70% similar
no public price
Operative
● AGENT70% similar
$29/mo Pro
AAPIs8Ranked by similarity
VerityLayer
● API76% similar
no public price
VerityLayer
● API75% similar
no public price
The Agent Forge
● API74% similar
no public price
Screwtape.ai
● API72% similar
no public price
paygent
● API72% similar
no public price
R/IV
● API71% similar
$79/mo Pro
Verity Suite
● API70% similar
no public price
Research Verification APIs
● API70% similar
no public price
MMCP servers21Ranked by similarity
CodeReview Loop
● MCP75% similar
no public price
MA
Maxim Pkk Attest
● MCP74% similar
99 one-time Pro
not monthly-comparable
Verificate
● MCP73% similar
$30/mo Pro
-49% vs Pro median
Fidenta Verify
● MCP72% similar
no public price
Mifori CertAgent
● MCP72% similar
no public price
citation-needed
● MCP72% similar
no public price
TruthGate
● MCP72% similar
no public price
Doublecheck
● MCP72% similar
no public price
DA
Datoka Agent
● MCP72% similar
no public price
OA
Oathlayer
● MCP72% similar
no public price
Proofpack
● MCP72% similar
no public price
TamperAudit
● MCP72% similar
$399/mo Pro
+576% vs Pro median
answer-check-mcp
● MCP72% similar
no public price
OpenInvar
● MCP71% similar
no public price
Simon Kiea Vera
● MCP71% similar
$69/mo Pro
+17% vs Pro median
DO
Document Integrity Validator
● MCP71% similar
$9/mo Pro
-85% vs Pro median
AgentSeed
● MCP71% similar
no public price
SideEye
● MCP71% similar
no public price
AffixIO
● MCP70% similar
no Pro plan
entry $24/mo
Mcp Test Tools
● MCP70% similar
no public price
Autoeval
● MCP70% similar
no public price
PPlatforms4Ranked by similarity
Agent Receipts
● PLATFORM73% similar
no public price
Agentavow
● PLATFORM71% similar
no public price
uni-report
● PLATFORM71% similar
no public price
Syntropy
● PLATFORM70% similar
no public price
FFrameworks1Ranked by similarity
Thea Software
● FRAMEWORK73% similar
no public price
OOther5Ranked by similarity
Hermes Guard
● OTHER72% similar
no public price
Proofreader Skill
● OTHER72% similar
no public price
Code Oracle
● OTHER71% similar
no public price
Prodlint
● OTHER70% similar
no public price
16agents
● OTHER70% 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.