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PromptSpend vs Mumble AI

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 Mumble AI
DetailPromptSpend logo PromptSpendMumble AI logo Mumble AI
What it doesLLM API cost calculator and comparison tool Voice tools for humans with things to say
StageNot given MVP
FoundedNot given Not given
Based inNot given US
Pricing modelOpen source Freemium
PricingFree Mumble Dictation: Free tier with unlimited on-device dictation, no account needed. Pro is $50 one-time purchase (Early bird price $100, currently $50) including AI cleanup, AI Transforms, custom prompts, voice actions, and priority support. Mumble AI is free during beta.
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
  • Works in every app on your Mac
  • Runs on-device, even offline
  • Supports 40+ languages, mixed mid-sentence
  • AI Transforms to reshape text
  • Custom prompts for any output
  • Voice actions: GIF, web search, ask AI
  • Personal dictionary that learns your words
  • Meeting notes with decisions and next steps
  • Works with every meeting app
  • 30-day money-back guarantee on Pro
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
  • Fully on-device processing, audio never leaves your Mac
  • No subscription required, one-time purchase for Pro
  • No bot joins your calls for meeting notes
  • Works offline without login or account
  • Dictation goes beyond text with custom output formats
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)7 no change since last check16 no change since last check
Trust Flow (Majestic)37
Citation Flow (Majestic)1930
Referring domains (Majestic)48142

5 details filled in for both companies.

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