Crystal Knows
Personality intelligence platform with DISC and five other assessments for individuals, sales, and teams.
From $49/mo Free tier MCP server API
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Bottom line
Personality intelligence (DISC and others) for individuals, sales, and teams. Free profile; Premium is $49/mo.
Stands out for: A $0 living profile plus a $49 Premium, with an MCP and Personality API, which is unusual in assessments.
Watch out for: This is not a pre-hire job-fit exam like Berke. Sales and API SKUs start at $59 and $99. The free first-three-prospects credits are not a timed trial.
Overview
Crystal is a personality intelligence platform. People build a free profile across six assessments, then pay for guides, sales prospecting, team reports, or API/MCP access. It is used for communication and sales prep more than as a gated pre-hire test. HubSpot, Salesforce, and LinkedIn are named.
Pricing: Profile free; Crystal Premium $49/mo; Sales from $59/mo; Assessments from $99/mo; Personality API is credit-based and includes an MCP server. The vendor describes first-three-prospects credits, not a 14-day trial. There is a first-party MCP and API.
Who it's for
Best for
- Sales and recruiting individuals who want DISC-style prep
- Teams that want an MCP or Personality API
- HubSpot or Salesforce users
- Buyers who will start on the free profile
Not ideal for
- HR teams that need validated pre-hire job-fit testing
- High-volume hourly assessment programmes
- Companies that refuse personality tools in hiring
Key features
Six frameworks. DISC, Big Five, Enneagram, 16 Personalities, Strengths, and Values in one profile.
Work products. Personal guides, sales meeting prep, and individual/pair/group assessment reports.
Personality API + MCP. First-party REST API and MCP server at api.crystalknows.com for profile lookup and communication guidance.
Free to start. Permanent free profile; paid plans when you need Premium, Sales, or Assessments capacity.
MCP server
The vendor runs its own MCP server but does not publish one public address, so connect through the vendor's own setup steps.
Setup steps and live status MCP Directory Check your stack in the MCP readiness checker
Pricing
| Plan | Price | What you get |
|---|---|---|
| Crystal Profile | $0 forever | Six assessments and a living profile |
| Crystal Premium | $49/mo | |
| Sales | From $59/mo | 20 prospect profiles |
| Assessments Basic | From $99/mo | |
| Assessments Pro | $249/mo | |
| Assessments Max | $499/mo |
Free Crystal Profile forever ($0): six assessments and a living profile. Crystal Premium $49/mo. Sales from $59/mo (20 prospect profiles). Assessments from $99/mo (Basic) / $249 Pro / $499 Max. Personality API and MCP are credit-based (pay per call).
Checked 15 Sep 2026. Vendors change prices without notice.
Is Crystal Knows expensive?
Crystal Knows starts at $49/mo. We list 69 assessments tools in total. 14 have a free tier, and those with a public price typically start around $83 a month.
- 41 quote-based
- 14 free tier
- 32 public price
Worked out automatically from every assessments listing, so it updates as the directory changes.
Pros and cons
Pros
- Free profile plus a clear $49 Premium
- MCP and Personality API for product and CRM teams
- HubSpot and Salesforce named
Cons
- Not a Berke-style pre-hire exam
- Sales/API SKUs are separate and higher
- Credits are not a timed trial
Integrations
HubSpot Salesforce LinkedIn
What's new at Crystal Knows
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How Crystal Knows compares
See all Crystal Knows alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | ✓ | $49/mo | ✓ | ✓ | |
 Berke Assessment Pre-hire job-fit testing if Crystal's personality guides are the wrong instrument. | – | Sales-quoted | – | – | Compare |
| | – | $149/mo | ✓ | ✓ | Compare |
| | – | Quote-based | – | – | Compare |
 CrossChq Structured references if you need evidence of past performance, not a personality label. | – | Sales-quoted | – | – | Compare |
Berke AssessmentSales-quoted
Pre-hire job-fit testing if Crystal's personality guides are the wrong instrument.
$149/mo MCP API
Talent graph and sourcing if the problem is finding people, not reading DISC.
Quote-based
Recruiter workflow if Crystal is being used as a poor substitute for actual sourcing.
CrossChqSales-quoted
Structured references if you need evidence of past performance, not a personality label.
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