Heroku vs PlanetScale

Detailed side-by-side comparison

Heroku

Free

Heroku is a Platform as a Service (PaaS) that allows developers to deploy and run applications in the cloud without managing infrastructure. It supports multiple programming languages and provides automatic scaling, extensive add-ons, and Git-based deployment workflows for streamlined application hosting.

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PlanetScale

Free

PlanetScale is a serverless MySQL database platform built on Vitess that brings Git-like branching to database development. It enables horizontal scaling without sharding complexity and provides non-blocking schema changes for zero-downtime deployments.

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Feature Comparison

Feature	Heroku	PlanetScale
Primary Use Case	Full application hosting and deployment platform for web applications across multiple programming languages	Specialized serverless MySQL database platform with focus on schema management and horizontal scaling
Scaling Approach	Auto-scaling through dynos (containers) with load balancing for application instances	Horizontal database scaling powered by Vitess without requiring application code changes
Development Workflow	Git-based deployment where pushing code automatically builds and deploys applications	Database branching with deploy requests similar to Git pull requests for safe schema changes
Zero Downtime Changes	Rolling releases and preboot features minimize downtime during application deployments	Non-blocking schema migrations and online DDL ensure database changes happen without any downtime
Monitoring & Insights	Built-in logging and monitoring with application metrics, accessible through CLI and dashboard	Query insights dashboard showing performance metrics, slow queries, and connection pooling statistics
Ecosystem & Integrations	200+ add-ons marketplace including databases, monitoring, caching, and third-party services	Focused database solution with connection pooling, backups, and integrations primarily for database access

Pricing Comparison

Both tools offer free starter tiers, but serve different purposes and scale differently. Heroku's costs can escalate with dyno usage and add-ons, while PlanetScale pricing grows with database storage and row reads, potentially becoming expensive at high scales compared to traditional managed databases.

Verdict

Choose Heroku if...

Choose Heroku if you need a complete application hosting platform with minimal DevOps overhead, want to deploy full-stack applications quickly, or require support for multiple programming languages and extensive third-party integrations.

Choose PlanetScale if...

Choose PlanetScale if you need a scalable MySQL database with Git-like branching workflows for safer schema changes, want zero-downtime migrations, or are building applications that require horizontal database scaling without managing sharding infrastructure.

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Pros & Cons

Heroku

Pros

+ Extremely simple deployment process with minimal configuration
+ Extensive ecosystem of add-ons for databases, monitoring, and third-party services
+ Excellent documentation and strong developer community
+ Automatic security patches and platform maintenance

Cons

- Can become expensive at scale compared to infrastructure alternatives
- Limited control over underlying infrastructure and configuration
- Cold start issues with free and basic tier dynos after inactivity

PlanetScale

Pros

+ Eliminates downtime during schema changes with online DDL
+ Git-like branching workflow makes database development safer and more collaborative
+ Scales horizontally without application code changes
+ Generous free tier suitable for hobby projects and small applications

Cons

- Limited to MySQL compatibility only, no PostgreSQL or other database support
- Foreign key constraints are not supported due to Vitess architecture
- Can be more expensive than traditional managed databases at higher scales