PromptSpend vs DiffCue

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

PromptSpend compared with DiffCue
Detail	PromptSpend	DiffCue
What it does	LLM API cost calculator and comparison tool	Code review for uncommitted git changes before you commit
Stage	Not given	Startup
Founded	Not given	Not given
Based in	Not given	CA
Pricing model	Open source	Paid
Pricing	Free	5 free reviews with no signup or credit card, then $4.99 once for unlimited use on up to 2 Macs. A review includes every AI summary, explanation, and chat message for one repo for one day. No subscription; 30-day refund policy. Free 1.x updates included.
Key features	Estimate LLM API costs for 109 models Compare pricing across 16 providers Paste prompt and see cost comparison Free tier information for each model Optional email price alerts Data processed on device, not transmitted Available as native iPhone and Android apps Pricing API available VS Code extension	Hunk-by-hunk code explanation with AI Interactive chat thread per hunk for follow-up questions Side-by-side before and after view of changes One-line AI summary for each file Saved chat threads and explanations that persist between sessions Support for OpenAI, OpenRouter, or any OpenAI-compatible endpoint API key stored securely in macOS Keychain Works with code written by humans or AI agents License works on up to 2 Macs
What makes it different	Pricing automatically re-checked every morning against tracked sources Completely free with no accounts or ads required Pasted text stays on your device and is never transmitted Open source MIT licensed codebase Covers 109 models from 16 providers in a single comparison	One-time $4.99 purchase with no subscription or recurring fees Free trial with 5 reviews and no signup or credit card required Built specifically for reviewing uncommitted changes, not a general git client with chat attached Your code never leaves your chosen AI provider, never sent to DiffCue Interacts with AI agents from Cursor, Copilot, Claude Code, and Windsurf
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)	7 no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	3	0
Citation Flow (Majestic)	19	12
Referring domains (Majestic)	48	1

5 details filled in for both companies.

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