Pricing

Plans & Access

Spark is free to read and free for verified students. Institutions fund workspaces for their campus, and everyone keeps their personal account for life.

During our current preview, Professional access is unlocked via invitation code at no cost.

Observer

Read, follow, and explore public discussions across Spark.

Free

Read public posts, debate sessions (+, −, ×), and synthesis documents (÷)
Follow threads and thinkers to build your reading feed
Participate in Trusted Circles when invited by an author
Keep a personal account with hardware-backed passkey and 2FA security

Create Free Account

Student

For university students verifying with an academic email address.

Free with academic email (.edu)

Publish up to 7 original posts per year (up to 2,100 characters each)
Contribute across all four discussion sessions (+, −, ×, ÷)
Create private Trusted Circles and invite collaborators
Send and receive 1:1 Direct Messages and build your Activity Spectrum

Verify Student Email

Professional

For independent researchers, educators, and professionals.

Included with beta invitation

Unlimited posts with extended 4,200-character descriptions
Schedule posts in advance with Send Later
Initiate 1:1 Direct Messages with anyone on Spark
Full access to Trusted Circles, synthesis editing, and public profiles

Join Spark