Cosmic vs Potassium Executor
Two lifetime executors — Cosmic at $9.99, Potassium at $22.99. Both hit 99% UNC. The $13 gap buys you a decompiler and multi-inject. Whether that is worth it depends entirely on how you script.
Our Verdict
Cosmic wins for casual-to-regular scripters who just want lifetime 99% UNC execution at minimum cost. Potassium wins for serious scripters who need a decompiler or multi-inject — those features alone justify the $13 premium. If you will never use a decompiler or run multiple instances, Cosmic is the clear value play.
The Lifetime Model: Why It Matters
Both Cosmic and Potassium use a one-time lifetime payment model, which is unusual in an executor market dominated by weekly subscriptions. The value calculation is clear: Synapse Z costs $3.99/week, meaning you break even on a $9.99 Cosmic purchase in just over two weeks. For Potassium at $22.99, break-even against Synapse Z is around six weeks. Anyone who uses an executor consistently for more than six weeks saves money with a lifetime purchase. Both are strong options for that reason — the question is which features justify the price gap between them.
What the $13 Price Gap Gets You
The $13 difference between Cosmic and Potassium buys two features: a built-in decompiler and multi-inject support. The decompiler allows you to reverse-engineer Roblox game scripts to understand game internals, find exploitable patterns, and develop your own scripts from a position of full visibility into how the game works. Multi-inject lets you run scripts across multiple Roblox instances simultaneously. For users who actively develop scripts or farm multiple accounts, both features have clear practical value. For users who only run community scripts in a single window, neither feature is ever used — and the $13 saves you nothing you needed.
Script Compatibility
Both executors achieve 99% UNC. For everyday script execution — auto-farms, ESPs, game utilities, teleporters — both perform identically. There is no compatibility scenario where Potassium runs a script that Cosmic cannot. The UNC ceiling is the same for both, and that ceiling covers everything you are likely to encounter in community script collections.
Which Should You Choose?
Choose Cosmic if...
- ▸You only run community scripts
- ▸You use a single Roblox instance
- ▸You have no interest in a decompiler
- ▸You want lifetime 99% UNC at minimum cost
Choose Potassium if...
- ▸You develop your own scripts
- ▸You want to decompile game scripts
- ▸You farm multiple accounts simultaneously
- ▸You want the full feature set for life
Cosmic vs Potassium — FAQ
Is Cosmic or Potassium the better lifetime executor?
Depends on your use case. Cosmic ($9.99) is the better value for users who only need script execution — it costs less and delivers the same 99% UNC. Potassium ($22.99) is better for users who want a decompiler or multi-inject. Pay for what you will actually use.
Does Cosmic have a decompiler?
No. Cosmic does not include a decompiler. If decompiler access is important to you, Potassium or Synapse Z are the alternatives.
Is a lifetime executor safe to buy?
The main risk with lifetime executors is development continuity — if the team stops updating, your purchase loses value. Both Cosmic and Potassium have maintained consistent updates. Check each executor's Discord activity before purchasing to verify the team is still active.
How does Cosmic compare to free executors like Velocity?
Velocity achieves 99% UNC for free with no key system. For users who only need execution, Velocity is technically comparable to Cosmic at zero cost. The case for Cosmic is stability, support, and not depending on a volunteer-maintained free tool for consistent updates.
Can I upgrade from Cosmic to Potassium later?
Check with each executor's support for upgrade pricing. Some lifetime executors offer discounted upgrades to higher tiers. If no upgrade path exists, you would pay full Potassium price on top of your Cosmic purchase.
Read the full reviews
Deep dives into both executors, or see the full paid executor comparison table.