Dyno Tiers
Last updated April 07, 2025
Table of Contents
Heroku dynos come in different tiers, each with its own sets of features. Each tier also offers different sizes of dynos with varying performance characteristics.
For specifications on individual dyno sizes within each tier, see Technical Specifications by Dyno Size.
Dyno Feature Support Comparison
All dynos share the features listed in our Dynos overview page.
In addition, certain features are available for specific dyno tiers.
| Eco | Basic | Standard | Performance | Private | Shield | Fir | |
|---|---|---|---|---|---|---|---|
| Metrics | X | X | X | X | X | X | |
| Language runtime metrics | X | X | X | X | X | X | |
| Preboot | X | X | |||||
| Horizontal scalability | X | X | X | X | X | ||
| Autoscaling | X | X | X | * | |||
| Dedicated compute instance | X | X | X | X | |||
| Dedicated networking | X | X | X | ||||
| Rolling deploy | X | X | X | ||||
| HIPAA-compliance | X | * | |||||
| Dyno sleeping | X |
*Coming to Fir dynos. Subscribe to our changelog to see when we add these features.
Continue reading for more details about each tier. For specifications of the individual plans within these dyno tiers, see Technical Specifications by Dyno Size.
Common Runtime Dynos
The Common Runtime offers 4 tiers of dynos, two of which have multiple sized dynos within their tiers. For technical specifications of the individual plans within the Common Runtime dyno tiers, see Technical Specifications by Dyno Size.
Eco Tier
The Eco dyno tier offers dynos in only one size: eco. Unlike our other dynos, where we charge for consumption of individual dynos separately, the Eco plan provides a monthly pool of Eco dyno hours. This pool is shared by all Eco dynos in your account, so it’s possible to run multiple apps for a $5 monthly flat fee. This low, flat fee makes it possible to run many small apps and prototypes economically. Eco dynos sleep automatically after a period of inactivity to conserve your dyno hours. Apps using Eco dynos can have only one dyno running per process type. For more info, see Eco Dyno Hours.
Basic Tier
The Basic dyno tier offers dynos in only one size: basic. Basic dynos are great for small projects, but lack the Preboot and scaling features that come with our higher dyno tiers. Apps using Basic dynos can have only one dyno running per process type.
Standard Tier
The Standard dyno tier offers multiple sizes of dynos. These general purpose dynos are great for running more robust apps. It supports features like Preboot. It’s possible to run a mix of Standard and Performance-tier dynos for the same app.
Performance Tier
We limit access to Performance dynos to customers with an established payment history.
The Performance dyno tier offers multiple sizes of dynos. In addition to having the same features as the Standard tier, Performance dynos are also single tenant, have higher compute and memory resources, and support Autoscaling. It’s possible to run a mix of Standard and Performance dynos for the same app.
Private Spaces Runtime Dynos
Cedar Private Spaces Runtime
Private and Shield dynos are only available with Cedar Private Spaces and Shield Spaces. The Cedar Private Spaces Runtime allows you to run apps on Private dynos in a Heroku Private Space or Shield dynos in a Shield Private Space. For technical specifications of the individual plans within this runtime’s dyno tiers, see Technical Specifications by Dyno Size.
Private Tier
The Private dyno tier offers multiple sizes of dynos. In addition to having the same features as the Performance tier, they also benefit from network isolation from running in an isolated space. While the dynos in the Common Runtime which have Preboot, Private dynos support Rolling Deploys to help you deploy apps with zero downtime. You can only run Private dynos in Private spaces.
Shield Tier
The Shield dyno tier offers multiple sizes of dynos. In addition to having the same features as the Private tier, they’re also HIPAA-compliant and run in a HIPAA-compliant space. You can only run Shield dynos in Shield Private Spaces.
Fir Private Spaces Runtime
Fir Tier
With the addition of the Fir runtime, we offer the ability for apps to choose between numerous ARM-based dyno sizes. ARM processors are highly optimized for parallel processing and power efficiency, which can result in better price-to-performance ratios for certain workloads. The dyno sizes we offer are unique in the sense that they offer much more customization around the resources that they provide. Fir dynos have similar features to Private-tier dynos for Cedar Private Spaces, with autoscaling and HIPAA-compliance options yet to come.
Basic Guidance For Choosing a Dyno Tier
Here’s some general guidance for choosing a dyno tier, depending on which runtime you deploy to.
Additional Reading
Read these articles to learn more about dynos and working with your dyno formation: