When is Abby the better choice?

You want to run a small A/B test as part of your feature flag workflow. You only need a handful of flags or remote configs and can stay under 1,000 events per month. You are building with React or Next.js and want the product positioned around SSR and SSG workflows. You prefer a simple project-based plan and do not mind tighter caps on usage.

When is ConfigCat the better choice?

You want a free plan with no credit card required. You need unlimited teammates on the free tier. You need more flag-management structure like segments, targeting rules, rollout controls, and audit logs. You are managing multiple products or expect to hand the tool to a larger team before paying. You care more about governance and collaboration than built-in A/B testing.

Abby vs ConfigCat: Free Tier Comparison

Q: How much does Abby cost after the free tier?

Starter - $12 /mo per Project. Abby stays flat-priced and simple: the first paid tier is Starter at $12 per project per month, then Startup at $89, with Pro and Enterprise on contact sales. ConfigCat is also flat-priced, but its paid ladder starts much higher at $110/mo for Pro, then $325, $900, and $4,500. That means Abby is cheaper for small paid usage, especially if one project fits within Starter. ConfigCat becomes more expensive sooner, but it also includes broader team and governance features. No usage-based pricing is provided for either product, so there are no per-event cost scenarios to calculate from the input.

Q: How much does ConfigCat cost after the free tier?

Pro - $ 110 / mo. Abby stays flat-priced and simple: the first paid tier is Starter at $12 per project per month, then Startup at $89, with Pro and Enterprise on contact sales. ConfigCat is also flat-priced, but its paid ladder starts much higher at $110/mo for Pro, then $325, $900, and $4,500. That means Abby is cheaper for small paid usage, especially if one project fits within Starter. ConfigCat becomes more expensive sooner, but it also includes broader team and governance features. No usage-based pricing is provided for either product, so there are no per-event cost scenarios to calculate from the input.

Quick answer

ConfigCat - ConfigCat wins for most builders because its free tier is no-card, includes more collaboration and governance features, and has a clearer path for growing flag-heavy teams, while Abby is better only if you specifically need A/B testing inside the same product.

How the free tiers compare

These two are both feature-flag and remote-config tools, but they optimize for different free-tier tradeoffs. Abby’s free plan is narrower and more experiment-oriented: 1,000 events per month, 1 A/B test, 3 flags or configs, and 5 environments. That makes it handy for small products that want to test one thing and keep the setup lightweight. ConfigCat’s free plan is broader for team use: no credit card required, 10 flags, 2 environments, 2 products, 2 segments, rule and rollout controls, API access, audit logs, compliance, and unlimited seats. Abby gives you an A/B testing hook that ConfigCat does not advertise here. ConfigCat gives you more room to grow before you pay, especially if your bottleneck is team access, governance, or flag management rather than experimentation.

Abby vs ConfigCat free tier, side by side

	Abby FTV 51	ConfigCat FTV 60
Feature flags / remote configs Abby caps the total count; ConfigCat allows more per product on the free plan.	3	10 per product
Environments Abby offers more environments on the free tier.	5	2 per product
Products ConfigCat explicitly limits free usage to 2 products.	Not stated separately	2
A/B tests This is the clearest functional advantage for Abby.	1	Not included
Events per month Abby’s free tier is event-metered; ConfigCat’s free tier is not described this way.	1,000	Not stated
Segments ConfigCat includes segmenting on the free plan.	Not stated	2 per product
Targeting rules per feature flag ConfigCat exposes more flag targeting controls in free.	Not stated	4
Percentage rollout options per feature flag ConfigCat includes rollout controls in free.	Not stated	4
Seats ConfigCat explicitly allows unlimited team members.	Not stated	Unlimited
Credit card required ConfigCat explicitly says no credit card is required.	Not stated	No

After you outgrow the free tier

Abby stays flat-priced and simple: the first paid tier is Starter at $12 per project per month, then Startup at $89, with Pro and Enterprise on contact sales. ConfigCat is also flat-priced, but its paid ladder starts much higher at $110/mo for Pro, then $325, $900, and $4,500. That means Abby is cheaper for small paid usage, especially if one project fits within Starter. ConfigCat becomes more expensive sooner, but it also includes broader team and governance features. No usage-based pricing is provided for either product, so there are no per-event cost scenarios to calculate from the input.

Abby next step Starter - $12 /mo per Project Flat monthly

ConfigCat next step Pro - $ 110 / mo Flat monthly

When to pick each one

Pick Abby when…

You want to run a small A/B test as part of your feature flag workflow.
You only need a handful of flags or remote configs and can stay under 1,000 events per month.
You are building with React or Next.js and want the product positioned around SSR and SSG workflows.
You prefer a simple project-based plan and do not mind tighter caps on usage.

Pick ConfigCat when…

You want a free plan with no credit card required.
You need unlimited teammates on the free tier.
You need more flag-management structure like segments, targeting rules, rollout controls, and audit logs.
You are managing multiple products or expect to hand the tool to a larger team before paying.
You care more about governance and collaboration than built-in A/B testing.

Bottom line

For the most common builder use case, ConfigCat is the better free-tier choice because you can start without a card, bring in unlimited teammates, and stay on free longer while you manage flags, segments, and rollout rules. Abby only pulls ahead if your immediate need is to pair feature flags with a small amount of A/B testing and you are comfortable with tighter caps. If you expect the tool to spread across a team, ConfigCat is the safer starting point.

Read the full listings: Abby and ConfigCat. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.