Prism vs sizeless: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Prism and sizeless — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Prism
Prism
A native macOS AI workspace with multi-provider chat, hosted models, an MCP registry, and @-tools.
Key features
- Multi-Provider Chat: Use GPT-5.5, Claude Opus, Gemini, and local models and compare providers side by side in one workspace.
- Prism Hosted: Access frontier models for reasoning, coding, and long-context work without bringing your own API key.
- Quick AI: Summon any model from any macOS app without breaking your flow.
- MCP Registry and @-Tools: Curated MCP servers with saved credentials and @-mention tools for file, quiz, and flash-card flows inside the thread.
- Local Proxy: An OpenAI-compatible local proxy on paid plans routes external IDEs and CLIs like Claude Code through your configured models.
- Native macOS Design: A single SwiftUI window for chat, tools, and history built specifically for Mac.
Best for
- Comparing Models Side by Side: Test the same prompt across multiple providers and pick the best answer.
- Key-Free Frontier Access: Use top hosted models through Prism Hosted without managing your own API keys.
- In-App AI Anywhere: Trigger Quick AI from any Mac app to draft or answer without switching context.
- Routing Coding CLIs: Point Claude Code and other CLIs at the local proxy to use Prism-configured models.
- Tool-Augmented Chat: Use MCP servers and @-tools to run file, quiz, and flash-card workflows directly in chat.
sizeless
sizeless
Turns a smartphone video of an open trench into a centimetre-accurate 3D point cloud, CAD as-built plan and GIS-ready digital twin of buried utilities.
Key features
- Smartphone capture: Field crews record an open trench with a standard iPhone Pro — no specialist scanning hardware and no separate surveying appointment
- Centimetre-accurate point clouds: Reconstruction algorithms developed at ETH Zurich build a high-resolution 3D point cloud of the excavation from the video alone
- Standards-compliant CAD output: Generates as-built plans in DWG and DXF, with couplings and pipe runs identified and measurements simplified
- 3D digital twin and GIS export: Produces a model of the pipe route including building entries that drops into existing GIS systems
- Works without GPS: Captures basement sections and building entry points where GNSS-based surveying fails
- Immediate backfilling: Because capture takes minutes, trenches close right after filming instead of waiting on a survey crew
- Documentation in about 72 hours: Complete records arrive weeks earlier than conventional surveying, enabling prompt connection billing
- Third-party utility capture: Records crossing utilities and as-laid geometry as unbroken 3D evidence, replacing hand sketches
Best for
- A utility network operator documenting residential service connections without booking a surveyor for every site
- A contractor closing a trench the same day instead of leaving it open pending a survey appointment
- Capturing a building entry point in a basement where GPS-based surveying cannot get a fix
- A district heating project producing as-built DWG plans for regulatory sign-off
- Spotting a laying error in the 3D point cloud before backfilling, while the fix is still cheap
- Feeding as-built pipe geometry into a GIS system for long-term network maintenance planning