Grist vs PromptShield

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

Grist compared with PromptShield
Detail	Grist	PromptShield
What it does	A complete coding-agent harness	Stop rewriting prompts. Get better AI answers.
Stage	MVP	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Not given	Freemium
Pricing	Free to use with bring-your-own-key for inference. Inference runs on your own provider key (OpenRouter, Vercel AI Gateway, or any OpenAI-compatible endpoint) at provider rates with zero markup from Grist.	Free: 3 successful optimizations per day, full optimizer quality, no credit card required. Pro: $7.99/month for unlimited successful prompt optimizations.
Key features	Confidence-gated model routing Institutional memory Local code execution SoL-Pi token compression Multi-rung cost routing Codebase learning Specialist subagents OpenCode v2 plugin	One-click prompt optimization across 7 AI chats Prompt Library and Optimization History Guard feature for sensitive information detection Local image text OCR checking Coach and Personalization Apply without sending functionality
What makes it different	Spend only on task difficulty, not habit Code never leaves your machine Zero markup on inference costs	Same high-quality optimizer in both free and paid versions No credit card required for free plan Local data storage for library, history, and personalization Works within existing AI chat interfaces without leaving them Transparent about data handling and privacy
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 +3 (up) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	0	9
Citation Flow (Majestic)	21	19
Referring domains (Majestic)	59	9

4 details filled in for both companies.

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