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PCWattVault vs Volley

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

PCWattVault compared with Volley
DetailPCWattVault logo PCWattVaultVolley logo Volley
What it doesReal-time PC power consumption monitor for Windows with electricity cost tracking API sequence diagram tool with payloads on every arrow
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Freemium
PricingFree. All Pro features are currently free for early adopters with founder/early-adopter status. Free: editor, local diagrams, share links, SVG and PNG export, CLI, 3 saved diagrams, HAR imports up to 8 requests, 200 hosted API and MCP calls a month, 1 webhook inbox with 25 requests a month, 1 recording link with 3 recordings. Pro: $9/month or $90/year (billed in advance), up to 1,000 saved dia
Key features
  • Local-first with no cloud sync, no accounts and no telemetry
  • Plain-text sequence diagram editor with real-time rendering
  • Request and response payloads displayed on every arrow
  • HAR file import with automatic redaction of secrets
  • Webhook inbox to capture and diagram provider deliveries
  • Recording links to collect customer HAR files as diagrams
  • Drift Check to update diagrams when APIs change
  • SVG and PNG export for sharing and embedding
  • AI agent support via MCP server, HTTP API and CLI
  • README embeds that update when diagrams are edited
  • Presentation mode for step-through walkthroughs
What makes it different
  • Permanent history recording in background so no data gaps occur
  • Founder status guarantees all current Pro features remain free forever
  • No account needed to write and share diagrams
  • AI can write diagrams from plain-text syntax
  • Built from real traffic: HAR files, webhooks and customer recordings
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)2 −1 (down) since last check3 no change since last check
Trust Flow (Majestic)03
Citation Flow (Majestic)122
Referring domains (Majestic)28

5 details filled in for both companies.

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