What is Crystal Knows?
Crystal is a personality platform that offers free self-assessments and predicts a person's DISC type from public professional information to give communication and selling guidance. It runs as a web app, a Chrome extension for LinkedIn, and a Personality API with an MCP server for AI assistants.
Who it's for
Crystal's pricing page covers individuals (Premium), teams (Premium Team and Team Assessments for workshops and client programs), sales teams (Buyer Profiles with meeting-prep briefs and HubSpot and LinkedIn connectors) and developers (Personality API). Its MCP page describes use from Claude, ChatGPT, Microsoft Copilot, Cursor and other agent clients.
Pros & cons
Strengths
- Crystal says its free assessments number 43 across personality, values, career and goals, with frameworks that include DISC, Enneagram, Big Five and Character Strengths.
- The free plan costs $0 with no card or timed trial, and lists unlimited retakes of every assessment, up to 10 contacts, 10 predicted LinkedIn assessments and one free sample of each advice type.
- Premium lists unlimited predicted assessments, how to work with each person, pre-meeting briefs, profile sharing or download, and Crystal for Chrome, which shows insights on LinkedIn profiles.
- Crystal says predictions use public professional information (such as job titles, skills and experience) plus an anonymized assessment dataset, and reports about 85% accuracy for AI-only predictions and about 95% for people who took a Crystal assessment.
- The Personality MCP server lists 13 tools, including search, selling_to, revise_email and analyze_call_transcript, with OAuth sign-in for Claude and ChatGPT, and an API key option for other clients.
- Per the API page, failed requests cost no credits, re-fetching the same profile in a billing cycle is free, and the generate_prompt endpoint is free.
Limitations
- On the free plan, each advice type is limited to one free sample (1 guide, 1 career analysis, how to work with 1 person), and Crystal says each type then requires Premium.
- Premium is listed at $49 a month or $490 a year; Premium Team is $49 per seat a month with no annual rate listed and shares each member's full profile with the team by default.
- Team Assessments are billed annually only, with participant and report caps for the full year (10, 60 or 240). Buyer Profiles use custom pricing, and API credit prices are not published. The API page labels its products Preview and lists a 120 requests-per-minute limit per token.
- Crystal's privacy policy says people profiled from public sources may be unaware of the analysis and names no opt-out for them beyond contacting the company. Its privacy FAQ cites GDPR, CCPA and SOC2, while the policy text does not mention CCPA and shows a December 2022 update date.
- No refund terms are stated on the pricing page; it says Premium can be canceled anytime, and cancellation terms for team plans are not specified.
Plans and pricing
- Free: $0. No card or timed trial. Unlimited assessment retakes, up to 10 contacts, 10 predicted LinkedIn assessments, and one free sample of each advice type.
- Premium: $490 a year billed annually, or $49 monthly. Individual plan. Unlimited predicted assessments, pre-meeting briefs, full guides, profile sharing or download, and Crystal for Chrome. Cancel anytime.
- Premium Team: $49 per seat a month. An admin buys seats in billing settings and assigns them as members join. No annual rate listed. Each member's full profile is shared with the team by default.
- Team Assessments: Starter $500, Basic $1,500, Pro $5,000, all billed annually. Starter: 10 participants and 10 reports. Basic: 60 and 60. Pro: 240 and 240, with personality curriculums and resources for workshops. Limits cover the full year; larger programs are quoted.
- Buyer Profiles: Custom. Priced by team and volume. Lists buyer profiles, meeting-prep briefs, follow-up guidance, LinkedIn and HubSpot connectors, Crystal for Chrome, and team billing and onboarding.
- Personality API and MCP: Pay per call (credits). Self-serve API key. Credits are spent on new profiles, email revisions and reads; re-reads in the same billing cycle are free. Enterprise terms go through sales.
Prices were read on Crystal's official pricing page (Premium also appears on its how-crystal-works page at the same $49 monthly and $490 yearly) and are in US dollars. Per-credit API prices and refund terms are not published, and the Team Assessments kit and Customer Success Manager features are not clearly tied to a tier. Confirm on the live pricing page.
Details checked October 2026 against the vendor's own pages. Prices and limits change, so confirm before you buy. Official pricing page ↗
Sources
This profile was compiled from these public pages. We have not run hands-on tests.
Crystal Knows — at a glance
Crystal is a personality platform that offers free self-assessments and predicts a person's DISC type from public professional information to give communication and selling guidance. It runs as a web app, a Chrome extension for LinkedIn, and a Personality API with an MCP server for AI assistants.
Try Crystal Knows →