PromptSpend vs Mosaic

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 Mosaic
Detail	PromptSpend	Mosaic
What it does	LLM API cost calculator and comparison tool	Everyone's AI coding sessions, in one place.
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Open source	Not given
Pricing	Free	Not given
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	Not given
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	Not given
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)	8 +1 (up) since last check	30 no change since last check
Trust Flow (Majestic)	3	14
Citation Flow (Majestic)	19	30
Referring domains (Majestic)	48	107

1 detail filled in for both companies.