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AI · head to head

Grok vs Vellum

Grok logo

Grok

AI

Conversational AI assistant from xAI with multimodal capabilities and local model support

From
On request
Rated
-
Full reviewWebsite
Vellum logo

Vellum

AI

Personalized AI assistant with persistent memory and autonomous action-taking

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Vellum has a free tier, so it costs nothing to try first.
  • Each has a real cost: Grok pricing is not published; all access requires sales contact or account negotiation; Vellum pricing varies significantly by computational tier, making budget planning difficult
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Grok and Vellum actually diverge.

Attributes where Grok and Vellum differ
AttributeGrokVellum
Starting priceOn requestFree
Pricing modelquoteFreemium with paid plans and pay-as-you-go credits
Free tierNoYes
PlatformsWeb, X integration, API (Python SDK)Web, macOS, iOS, Slack, Telegram, Terminal

Identical on both: user rating (Not yet rated), category (AI).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Grok

Nothing recorded that Vellum does not also cover.

Only in Vellum

  • Persistent AI identity
  • Long-term memory
  • Email automation
  • Calendar management
  • Autonomous task execution
  • Multi-device synchronization
  • Custom plugins
  • Open-source deployment

What people use each for

The jobs each tool is most often brought in to do.

Grok

  • Social media context-aware conversational AI via X integrationnot Vellum
  • Image and video understanding through APInot Vellum
  • Reasoning tasks with configurable compute budgetsnot Vellum
  • Autonomous tool use and web search integrationnot Vellum
  • Open-weight model deployment of Grok-1 architecturenot Vellum

Vellum

  • Personal productivity automation across email and calendarnot Grok
  • CRM updates and pipeline managementnot Grok
  • Expense report generation and managementnot Grok
  • Document drafting and content creationnot Grok
  • Meeting scheduling and calendar coordinationnot Grok

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Grok

  • Pricing is not published; all access requires sales contact or account negotiation
  • Limited ecosystem compared to OpenAI and Anthropic; fewer third-party integrations
  • Organisational reputation tied to Elon Musk; policy or direction changes may affect service continuity

Vellum

  • Pricing varies significantly by computational tier, making budget planning difficult
  • Requires explicit permission for sensitive actions, limiting autonomy
  • Self-hosting option may intimidate non-technical users
  • Learning curve to develop customizations with plugins

Pricing, plan by plan

Grok

On request

No published plan breakdown. See the Grok review.

Vellum

Free
  • FreeFree
    • Starter credits included
    • Basic features
  • Mighty$30/month
    • 1 vCPU, 2 GiB RAM
    • 10 GB storage
    • Included usage allowance
  • Super$100/month
    • 2.5 vCPU, 5 GiB RAM
    • 30 GB storage
    • Assistant email and subdomain
  • Ultra$200/month
    • 4 vCPU, 8 GiB RAM
    • 60 GB storage
    • Assistant email and subdomain

Which should you pick?

Choose Grok if

  • You work on Web, X integration, API (Python SDK).
Grok review

Choose Vellum if

  • You need persistent ai identity.
  • You want to start without paying.
  • You work on Web, macOS, iOS, Slack, Telegram, Terminal.
  • You also want long-term memory.
Vellum review

Questions people ask

Is Grok or Vellum better?
Neither clearly leads. Grok starts at On request and Vellum at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Grok or Vellum?
Vellum has a free tier; the other does not. Paid plans start at On request for Grok and Free for Vellum.
Does Grok or Vellum run on more platforms?
Grok runs on Web, X integration, API (Python SDK). Vellum runs on Web, macOS, iOS, Slack, Telegram, Terminal.
Can I use Vellum for free?
Yes. Vellum has a free tier, so you can try it without paying. Grok starts at On request.
What is Grok best used for?
Grok is most often used for social media context-aware conversational ai via x integration, image and video understanding through api, reasoning tasks with configurable compute budgets, autonomous tool use and web search integration. Of those, social media context-aware conversational ai via x integration and image and video understanding through api are not what Vellum is typically brought in for.
What can Grok do that Vellum cannot?
Vellum covers Persistent AI identity, Long-term memory, Email automation, Calendar management.

Answered from the vendors’ own pages

Vellum: How does Vellum protect my data privacy?

Vellum uses permission-based controls requiring explicit approval for sensitive actions. Data is encrypted and the option for self-hosting provides complete data control. Open-source deployment option allows hosting on your own infrastructure.

Source
Vellum: Can I use Vellum for business team collaboration?

Vellum is primarily designed as a personal assistant with persistent identity. For team collaboration, platforms like Lindy offer better multi-user features with shared credit pools and Slack workspace integration.

Source
Vellum: What does the free tier include?

Vellum offers free starter credits to begin using the platform. Beyond that, it operates on a pay-as-you-go credit model with paid tiers starting at $30/month for increased computational resources and bundled credits.

Source
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