Volley vs Steward

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

Volley compared with Steward
Detail	Volley	Steward
What it does	API sequence diagram tool with payloads on every arrow	A Mac app that turns GitHub pull-request notifications into a sorted inbox with AI-assisted code review
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Paid
Pricing	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	$10 one-time purchase at launch, then $20 for future customers. All future updates included. 14-day free trial available.
Key features	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	Sorted inbox that separates pull requests into Needs my eyes and FYI categories Morning report with daily briefing of pending reviews Layered diff viewer with logical code organization Code folding for TypeScript, JavaScript, and Ruby Keyboard shortcuts for quick actions Reviews ranked by importance and impact Automatic morning report even when app is quit
What makes it different	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	Layers diffs logically by code flow rather than alphabetically so you read them in writing order Separates actionable notifications from informational ones so less noise reaches your inbox Runs entirely on your Mac with no code sent to external servers
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)	3 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	3	0
Citation Flow (Majestic)	22	0
Referring domains (Majestic)	8	0

5 details filled in for both companies.

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