Product teams choose GrowthBook over Optimizely when they want to reduce complexity and cost with a warehouse-native experimentation, feature flags, and product analytics platform.
Modern product teams choose GrowthBook over AB Tasty when they want robust feature flags, advanced experimentation, and power product analytics at scale.
- Build experiments faster to run anywhere using developer-friendly design
- Own your experiment data with full transparency and self-hosting options
- Run 5x more experiments at 1/5th the cost
- Best for marketing teams running client-side tests
- Higher cost with surprise add-ons as usage grows
- Slow testing cycles and low trust results
GrowthBook’s warehouse native architecture lowers cost and complexity while giving product teams smarter feature flags and a single source of truth for all their product and experiment data.
Developer-friendly, full-stack experimentation platform
Conversion optimization platform for A/B testing
Designed For
Developers, product teams, analysts
Marketing teams
Primary Use
Test any new feature you build in any platform
A/B testing for conversion optimization
Statistical Methods
Bayesian, frequentist, sequential (with CUPED, post-stratification)
Bayesian
Deployment Options
Cloud or fully self-hosted
Cloud only
Pricing & Plans
Per-seat pricing with unlimited tests, unlimited traffic
No free tier, custom pricing only, with surprise add ons
Setup Time
Hours
Days to weeks
When experimentation limits slow you down, it’s time to switch to GrowthBook.
Product teams switch from AB Tasty to GrowthBook for warehouse-native product experimentation, robust feature flags, transparent statistics, and predictable pricing that scales with their product development needs.
Developer Experience
GrowthBook makes experimentation easy and accessible for both developers and non-technical stakeholders.
GrowthBook
- Developer-friendly, intuitive environment for fast iteration
- Chrome debugger + visual editor
- Clear documentation, AI chatbot access, and responsive support
- Flexible for both technical and non-technical stakeholders
- 24+ SDKs: JavaScript, React, Node.js, Python, Ruby, Go, PHP, Java, Swift, Kotlin, etc.
AB Tasty
- Complex setup, QA, and validation
- Visual editor
- Manual QA workflows
- Designed for marketing teams
- Limited SDK support
Performance & Scale
GrowthBook is designed for high-velocity experimentation and feature flags used by the largest websites and apps in the world.
GrowthBook
- Run any number of experiments on any amount of traffic
- Low-latency SDKs with rapid rule processing
- Scales from small teams to large enterprises on the same core platform
- 99.999% uptime for high traffic websites and apps
AB Tasty
- Best for web and mobile sites, not full-stack scale
- Slower cycles as testing volume increases
- Validation and reporting become harder as experimentation grows
Experimentation Depth & Flexibility
GrowthBook gives product teams the ability to test almost anything with complete control and flexibility.
GrowthBook
- Testing types: Supports A/B tests, multivariate tests, redirects, visual editor, and holdouts
- One platform for server-side, client-side, mobile, and edge experiments
- Full-stack coverage: server-side, client-side, mobile, and edge experiments
- Flexible targeting and randomization units user, location, postal code, URL path, etc.
- Statistical frameworks: Bayesian, frequentist, sequential (with CUPED, post-stratification)
AB Tasty
- Experimentation for A/B web and mobile tests
- Limited server-side and full-stack experimentation
- Limited flexibility to customize metrics and evaluation logic
- Difficult to run multiple tests at the same time
- Key experimentation capabilities require add-on or flagship products
Feature Flagging & Flag-Based Experiments
GrowthBook is preferred by teams that consider feature flags core infrastructure to product development.
GrowthBook
- World-class feature flags at the core
- Controlled rollouts, gradual exposure, and instant kill switches
- Zero network call SDKs for low latency and high reliability
- Unified system for flags and experiments
AB Tasty
- Feature flags are not a core strength
- Not designed for release-driven experimentation
- Limited server-side capabilities
Transparency & Warehouse-Native Architecture
GrowthBook's architecture is the most cost effective way to keep all your data in one place, with full control and visibility.
GrowthBook
- Bring your data architecture Snowflake, BigQuery, Redshift, Postgres, etc.
- Analyze all your product and experimentation data in one place
- Customize metrics using SQL, use metric libraries, and even add metrics retroactively
- Reproduce and confirm any GrowthBook calculation
AB Tasty
- No warehouse-native option
- Limited transparency into statistical models
- Reporting is difficult to audit independently
Privacy, Security & Deployment
GrowthBook works well for industries with strict privacy and compliance requirements, including AI, financial services, healthcare, education, and gaming.
GrowthBook
- Fully self-hosted, air-gapped option for data residency requirements
- Meets strict privacy compliance requirements GDPR, HIPAA, CCPA, SOC 2 Type II certified
- No end-user PII required. Your data stays in your data warehouse
- Open-source code is publicly available for security review on GitHub
AB Tasty
- No self-hosted deployment option
- Data stored in vendor-managed infrastructure
- Less control over data residency and access
AI-Ready & Future-Proof
GrowthBook gives product teams that embed AI into their products the full control they need to test and optimize AI features to maximize user engagement and business outcomes.
GrowthBook
- 3 of the 5 leading AI companies use GrowthBook to optimize their chatbots and APIs
- Design highly customized metrics to measure engagement, usage and outcomes
- Tune AI responses per use case with very targeted experiments
- MCP integration for natural language access to GrowthBook directly in IDE Claude Code, Cursor, VS Code
AB Tasty
- AI focused on personalization and conversion optimization
- Built for front-end experience testing, not backend or API-level experiments
- Limited control over custom AI metrics and model-level evaluation
Cost of Ownership
GrowthBook requires fewer people and resources at 1/5th the cost of AB Tasty.
GrowthBook
- Predictable per-seat pricing with unlimited experiments and unlimited traffic
- Free tier and open source options
- Enterprise self-hosting gives customers flexibility and control
- Warehouse-native architecture means you do not pay twice to capture the same data
AB Tasty
- No free tier or transparent pricing
- Custom pricing with higher cost and lower predictability
- Additional products required for key capabilities
What do GrowthBook users say?
“We don’t need any code changes, we don’t need an app release. We just configure the new tests and launch right away.”
Filipa Batista, Lingokids
“GrowthBook lets us build experiments exactly how we want. The ability to target... as granular as we want is a major hit for us.”
Eslam Samy, Floward
“Talk about bang-for-buck.”
FAQs
Which is better for strict privacy and data residency, GrowthBook or AB Tasty?
GrowthBook is better for strict privacy and data residency than AB Tasty. GrowthBook supports full self-hosting and keeps experiment data in your infrastructure, while AB Tasty does not offer a self-hosted deployment option.
How difficult is it to switch from AB Tasty to GrowthBook?
Switching from AB Tasty to GrowthBook is straightforward. Teams often run both in parallel, then migrate experiments gradually without rebuilding everything at once.
How does pricing compare between GrowthBook and AB Tasty?
GrowthBook is typically much cheaper and more predictable than AB Tasty. GrowthBook pricing allows for unlimited traffic, while AB Tasty uses custom pricing that often increases as usage grows, and many teams see GrowthBook at around 1/5 the cost.
Can AB Tasty run backend or server-side experiments?
Yes, but AB Tasty is limited for backend and server-side experimentation. GrowthBook supports backend, server-side, and full-stack experiments as a core use case.
Which has more trustworthy experiment results, GrowthBook or AB Tasty?
GrowthBook results are more transparent than AB Tasty’s. GrowthBook analyzes experiments in your data warehouse, while AB Tasty runs analysis inside its own platform. Also, GrowthBook has full SQL transparency. You can see the exact SQL query, verify, reproduce, and trust your results.
What is the main difference between GrowthBook and AB Tasty?
GrowthBook is built for full-stack product experimentation using your data warehouse, while AB Tasty is built for marketing-led client-side testing. GrowthBook is warehouse-native for product and engineering teams, while AB Tasty focuses on web and mobile UX experiments.
