Feynman vs X-Design 2.0: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Feynman and X-Design 2.0 — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Feynman

Companion

Free

Open-source AI research agent that reads papers, ranks literature, drafts research and plans experiments from the terminal or a local workbench.

Cited Research Briefs: Asking a research question returns a synthesized brief where each claim is tied to the paper or web source it came from, rather than an unsourced summary.
PaperRank Scoring: Ranks papers on a topic with transparent evidence for citations, methodology, reproducibility and provenance so reading order is a decision you can inspect.
Paper Access Resolver: Resolves a single DOI, arXiv ID, OpenAlex ID, PMID, PMCID or title against OpenAlex, arXiv/alphaXiv, DOI and Europe PMC, with optional full-text fetching.
Local Science Workbench: `feynman serve` opens a standalone app with projects, sessions, chat, notebooks, compute, artifact previews and provenance in one place.
Claim Auditing and Replication: Compares a paper's stated claims against what its code actually does, and generates replication plans with compute targets and gated experiment steps.
Local and Hosted Models: Works with hosted providers via OAuth or API key and with local runtimes including LM Studio, Ollama, vLLM and a LiteLLM proxy.
Skills-Only Install: The research skill library can be installed on its own into Claude, Codex or OpenCode projects without the terminal app or bundled runtime.
Science Artifacts: Reports, data files, spreadsheets, notebooks, LaTeX, chemistry sketches and genomes are browsable together with versions, lineage and execution logs.

Deciding What to Read: Ranking a fresh literature pile on a topic by reproducibility and methodology instead of citation count alone.
Writing a Literature Review: Producing a review that separates where the field agrees from where questions remain open, with citations attached.
Verifying a Paper's Claims: Auditing whether the results a paper reports are supported by the code and data it released.
Planning a Replication: Turning a published finding into a concrete replication plan with a compute target and staged experiment steps.
Running Deep Research Passes: Launching a multi-agent deep dive on a topic that synthesizes findings and verifies them before reporting.
Keeping Research Local: Running the whole pipeline against a local model so unpublished work and private data never leave the machine.
Adding Research Skills to a Coding Agent: Installing the skills bundle into an existing Claude or Codex project to get research workflows without a second app.

X-Design

Freemium

Creative AI agent and photo editor that instantly generates logos, brand guidelines, posters, social media assets, and product visuals.

Logo Generation: Instantly creates multiple professional logo concepts from user input or prompts, offering variations suitable for different placements and use cases.
Brand Guidelines Generator: Produces complete brand guidelines including color palettes and typography recommendations to ensure consistent identity across assets.
Social & Poster Asset Creator: Generates posters and social media assets sized and optimized for common platforms and campaign types to reduce manual resizing and layout work.
Product Visuals Creator: Creates polished product images and promotional visuals to improve presentation for e-commerce listings and marketing materials.
AI-Powered Photo Editor: Includes a free, AI-enhanced photo editor to retouch, adjust, and prepare photos for use in branding and marketing assets.
Template Library & Export: Provides ready-made design templates and export options to deliver print-ready and web-optimized files quickly.
Instant logo generation from user ideas/prompts
Automatic generation of complete brand guidelines
Poster and social media asset creation and templates
AI-powered photo editor (free)
Product visual generation optimized for small businesses
Export and asset delivery for marketing use

Small business branding: Rapidly generate a logo and full brand guideline for a new company to establish a consistent visual identity.
Social media campaigns: Produce platform-optimized posts, stories, and ad creatives for marketing campaigns with minimal manual design effort.
E-commerce listings: Create professional product visuals and promotional images to improve conversion and presentation on online marketplaces.
Event and print promotion: Design posters, flyers, and promotional materials for events or special offers quickly using generated templates.
Photo prepping and retouching: Use the free AI photo editor to enhance product or lifestyle photos before incorporating them into marketing assets.
Small business branding and identity creation
Generating social media posts and campaign assets quickly
Creating posters and promotional materials
Producing product visuals for e-commerce listings
Rapid prototyping of logo and brand guideline concepts