StarkWare Delegation Program- Terms & Conditions
By participating and receiving StarkWare’s delegated STRKs under the Delegation Program, you (“Validator”) agree to the following terms:
- Updated Validator Tracks. The program includes two eligibility tracks, and StarkWare may assign each Validator to the applicable track at its discretion:
- Seasoned Validators. To be eligible under this track, a Validator must:
- Have at least 3 months of active validator status.
- Maintain at least 99.5% liveness/uptime during the program period.
- Maintain at least 1,000,000 STRK staked (excluding any STRK delegated under StarkWare and Starknet Foundation delegation programs).
- Not exceed 5% of total consensus power.
- Complete required compliance checks (KYC/KYB or equivalent) per StarkWare requirements.
- Cap validator commission at no more than 10%.
- Participate in testnet operations starting from Q2 (as applicable).
- Emerging Validators. To be eligible under this track, a Validator must:
- Have at least 1 month of active validator status.
- Maintain at least 99% liveness/uptime during the program period.
- Maintain at least 20,000 STRK staked (excluding any STRK delegated under StarkWare and Starknet Foundation delegation programs).
- Not exceed 5% of total consensus power.
- Complete required compliance checks (KYC/KYB or equivalent) per StarkWare requirements.
- Cap validator commission at no more than 10%.
- Participate in Staking v3 testnet validations/testing when applicable.
- Seasoned Validators. To be eligible under this track, a Validator must:
- Notice and Removal. Maintaining compliance with the applicable participating and eligibility requirements under these Terms (including, without limitation, liveness/uptime, stake, commission cap, compliance checks, or any other applicable criteria) is a minimum requirement for participation in the program. If StarkWare determines, based on its records, that you have failed to meet any applicable requirement at any time, StarkWare may provide written notice and a cure period (the “Cure Period”) from the date of such notice for you to cure such failure. If, by the end of the Cure Period, your performance does not meet the applicable requirements, StarkWare may remove you from the StarkWare Delegation Program in accordance with these Terms.
- Re-Application Following Removal. If you are removed from the program due to failure to meet the applicable requirement(s), you may re-submit/re-apply to the program only by initiating a new application and completing the entire application and onboarding process again (including, without limitation, satisfying all then-current eligibility criteria and completing KYC/KYB (or equivalent) checks, as required by StarkWare).
- Independent Operation and Conduct. You will manage your validation activity independently and exercise your own technical and operational judgment.
- No Endorsement. The participation of a Validator in the Delegation Program is not an endorsement of individual validators.
- Changes to the Delegation Program. You understand that this Delegation Program may evolve in future phases and that its terms may be amended by StarkWare with reasonable notice.
- No Guarantees or Liabilities. Delegation is provided without any guarantee of rewards or future delegation.
To the extent permitted by law, StarkWare will be liable to you for indirect, incidental, or consequential damages arising from the Delegation Program. - Term Commitment. Absent any evidence of high-risk behavior, non-compliance with these terms, or reputational risk to the network, StarkWare agrees to maintain delegation to each eligible Validator for a period of one (1) year from the initial delegation date. StarkWare reserves the right to revoke delegation if a validator is found to engage in behavior that poses significant operational, legal, or reputational risk to the network, or violates these terms. Validators understand that this commitment is made in the spirit of supporting decentralization and validator stability, and is not a contractual guarantee of delegation.
- Delegation Discretion. StarkWare retains sole and absolute discretion to determine which Validators receive delegation and the amount of delegated STRKs provided to each Validator. StarkWare is under no obligation to provide delegation to any Validator, even if eligibility criteria are met.
Last Modified: January 2026
ethSTARK
Description
A library implementing ZK-STARK prover and verifier
Off-Chain Components
Prover – Open Source
Verifier – Open Source
On-Chain Components
None
StarkEx
Description
Scalability engine for commercial deployment
Off-Chain Components
Prover Service – Closed Source
Cairo Programs – Source Available
On-Chain Components
Cairo Verifier – Open Source
StarkNet / Cairo
Description
Scalability for L2 dApp developers
Off-Chain Components
Cairo Toolchain: StarkWare Toolchain License
Prover Service – Closed Source
StarkNet Prover (arriving later) – Polaris Source Available
On-Chain Components
StarkNet Polaris Verifier (arriving later) – Open Source
FAQs
What limitations does StarkWare's Source Available License impose on my use of Cairo programs?
You may distribute and run Cairo programs during the lifetime of the license, but you may not make commercial use of it, nor sell it. For more details, check the terms of the license here. The Source Available License applies for a limited time, while Starkware is considering what terms will apply afterwards.
Why did StarkWare adopt the Source Available License for its Cairo programs?
We wish to allow scrutiny of the programs and allow the public to read and audit the code in a transparent manner, during an initial testing period. StarkWare is still considering which licenses to use in the long term when releasing various components of the Cairo toolchain and applications built on it.
Why did StarkWare adopt the Source Available License for its Cairo programs?
Informally, the Polaris license says that anyone may use and modify the Prover code, including for commercial use, as long as proofs generated by it are submitted to one of the white-listed Polaris Verifiers. A white-listed Verifier is a smart contract address appearing on an append-only list, which means that StarkWare may only add Verifiers to that list, but never remove them.
The name Polaris (North Star) captures the essence of the license. The Polaris is a faithful address to which compasses and maps can be pointed, assisting free-roaming travellers on their myriad forays. Like the star, a Polaris Verifier is everlasting and unchanging. More coming soon.
The name Polaris (North Star) captures the essence of the license. The Polaris is a faithful address to which compasses and maps can be pointed, assisting free-roaming travellers on their myriad forays. Like the star, a Polaris Verifier is everlasting and unchanging. More coming soon.
If you have any questions about our products and how to use them, talk to us: