Playwright vs Selenium vs Cypress: What CTOs Should Choose in 2026

Three years ago, this was a genuinely open debate. Selenium had enterprise trust and a decade of ecosystem behind it. Cypress had developer enthusiasm and real momentum in frontend-heavy teams. Playwright was newer and promising, but nobody had stress-tested it at scale yet. A CTO making this call in 2021 had reasonable grounds to land anywhere on that map.

That map no longer exists.

One of our clients, Boostlingo, came to us with a testing stack that was completely sensible when it was built. By the time we sat down together, that same stack was slowing every release cycle and blocking the AI-assisted workflows their engineering team was already using. The framework had not gotten worse. The world around it had moved, and the stack had not moved with it.

That is what this debate actually looks like in 2026. A question of which framework fits how software teams build and ship today, which ones are quietly becoming a delivery cost, and what the AI shift specifically changed about that calculation. This article covers where each framework stands against those questions, what the migration decision actually involves, and what separates teams that hold their gains from teams that migrate and end up back in the same problem eighteen months later.

AI Changed The Framework Selection Criteria. Most Teams Are Still Using The Old Ones.

Framework selection used to be about developer experience, language support, and CI behavior. Pick the tool your engineers are comfortable with, make sure it runs cleanly in your pipeline, and move on. That criteria set was reasonable when tests were entirely human-written and human-maintained.

AI tooling changed both of those assumptions at once.

Copilot, Cursor, Claude Code, Codex, etc., and purpose-built QA agents are now part of how engineering teams write and maintain tests in practice. 

And these tools do not perform equally across frameworks. Playwright's TypeScript-native architecture and clean async API give AI generation tools a surface they can work with reliably. 

Selenium's verbose, Java-influenced patterns and older configuration models produce output that requires significantly more correction before it is usable. 

The gap shows up in how much AI-generated output actually ships versus how much gets thrown out or rewritten by hand.

That is a new cost that does not appear in any framework comparison written before 2023. A framework that was already showing maintenance friction at scale becomes more expensive when it also limits what your AI tooling can do with it. 

Selecting a framework now means selecting how much leverage your team gets from the tools they are already using every day.

There is also the scaling dimension that existed before AI and still matters independently. The framework choice that looks fine at thirty engineers starts showing its real cost at eighty. 

CI runs get longer. Flaky test maintenance absorbs sprint capacity. 

The suite that shipped fine becomes a recurring tax on delivery. 

Getting ahead of that curve means selecting for how a framework behaves under scale, not just how it behaves in an evaluation.

Both dimensions point in the same direction in 2026. But they are separate reasons, and both deserve to be in the selection decision.

How ThinkSys approaches this:

• We baseline three numbers before making any framework recommendation: flaky test rate, CI duration, and test maintenance time per sprint. Those tell us what the current framework is actually costing and give us a benchmark the migration has to beat.
• We measure AI tooling acceptance rate early. If a team is using Copilot or Cursor, we track how much generated output ships unmodified. A low acceptance rate is almost always a framework signal, not a prompting problem, and it changes the urgency of the migration conversation.
• We scope the migration before starting it. What moves, what gets rewritten, what CI looks like during transition, and who owns what on the other side. Teams that skip this step tend to complete around sixty percent of a migration and live in the gap indefinitely.

Want to know what your testing framework is actually costing your team?

Book a call

Playwright Is The Right Default. Here Is Why Each Reason Matters Separately.

Playwright wins new project decisions for several reasons that compound on each other. Collapsing them into a single verdict loses the part that is most relevant to any specific team's situation.

1. Selenium suites accumulate explicit waits and retry scaffolding as products grow more dynamic. Every UI interaction that does not behave predictably gets a workaround added to it. Those workarounds accumulate silently until they are a maintenance layer of their own. Playwright's waiting model starts from a cleaner baseline and eliminates most of that scaffolding before it is ever written. Over twelve months, that difference shows up in CI stability and in the engineers who stop spending Friday afternoons on flaky test investigation.
2. Modern SaaS products cross auth redirects, third-party providers, and stateful multi-step workflows in ways that single-tab browser session frameworks were never designed to handle. Playwright handles these natively. Older frameworks handle them through workarounds, and workarounds are where fragility lives.
3. Most scaling engineering teams today are TypeScript-heavy. Playwright is TypeScript-native. Engineers rotate onto the test suite without learning a separate paradigm, which means the suite gets maintained by the people closest to the product rather than by whoever last touched it.
4. State of JavaScript 2025 ranked Playwright first on both satisfaction and retention across all browser testing frameworks. That translates directly into hiring pool, internal champions, and onboarding speed. Going with the ecosystem costs less than going against it.
5. Next is AI tooling compatibility, and this is the reason that did not exist three years ago. Playwright's clean TypeScript API produces reliable output from AI generation tools. Teams that have paired a Playwright migration with AI-assisted scripting have seen test script delivery accelerate by around 25% without quality regression. That result, which we saw directly with Boostlingo, came from a framework that gave the AI tools something clean to work with. The framework made the AI effective. The AI made the framework investment compound faster than it would have on its own.
   
   Interesting Read: Playwright features updated 2026

How ThinkSys approaches this:

• Playwright is our starting point for every new automation engagement. We still validate it against the team's existing stack, language preferences, and CI infrastructure, but the burden of proof has shifted. The alternatives need to justify themselves now, not Playwright.
• We build in TypeScript from day one. The type safety pays during maintenance, and it is the prerequisite for getting clean, reviewable output from AI-assisted scripting tools.
• We stress-test auth flows and third-party integrations before building out wider coverage. These are the surfaces where framework constraints show up first. Finding them early costs far less than finding them after the suite is large.

Must Read: Why are tech leaders migrating from Selenium to Playwright?

Cypress Works Until It Doesn't. Knowing Where That Line Is Matters.

Cypress has genuine strengths. The developer experience is good. Frontend-heavy teams find it approachable. On a genuinely constrained product surface, it is fast to adopt and reasonable to maintain.

The issue is that its limits appear at the worst possible moment, when the product has matured enough that the hard paths actually need coverage. Cross-origin auth sequences, multi-tab workflows, and third-party integrations at your product's boundaries are where Cypress runs out of road. These are not edge cases. They are the tests that matter most once a product is live at scale, and Cypress handles them poorly or not at all.

The economics follow the same pattern. Parallelization costs stay invisible during evaluation and become visible once CI volume, browser coverage, and suite size rise together. By then, the tool is embedded, and replacing it is a significant project arriving at the worst time.

The AI dimension adds one more consideration. Cypress's sandboxed execution model and non-standard async handling produce noisier output from AI generation tools compared to Playwright. Teams using Copilot or Cursor on a Cypress stack spend more time correcting generated tests than teams on Playwright do. That is not a bigger issue on its own, but it sits on top of the other constraints rather than offsetting them.

Cypress is the right choice for a narrow set of conditions. Knowing whether your product actually fits those conditions requires mapping the third-party flows and cross-origin paths you will need to cover in the next twelve months, not just the ones you are covering today.

How ThinkSys handles this:

• For teams already running Cypress on a mature product, we map where it has stopped covering what actually needs testing. That gap makes the migration case clearer than any framework comparison does, and it gives the team a concrete scope rather than a theoretical argument.
• For new projects where Cypress is being considered, we run a twelve-month coverage mapping exercise before the decision is made. The integrations and cross-origin workflows a product will need covered within a year almost always settle the question faster than a feature evaluation does.
• When parallelization costs are already showing up, we treat that as a migration signal rather than an infrastructure problem to solve around. Building more CI infrastructure on top of a framework that is already showing scaling friction compounds the cost in both directions.

Selenium Still Has A Case

Selenium is not finished. A large existing estate, genuine WebDriver depth on the team, and migration costs that would currently harm roadmap execution more than the existing suite pain does; that combination is real, and it exists in many organizations. Staying as it is in that situation is the right call.

The line worth keeping sharp is between "not yet" and "not ever." Greenfield decisions and legacy decisions are not the same decision. If you are standardizing a new stack, Selenium is hard to defend on any dimension. If you are managing hundreds of existing tests tied to Java-heavy workflows, the question is an ROI question with a real answer, not a theoretical best-tool question.

The AI dimension adds something to that calculation that was not there before. Staying on Selenium means staying on an architecture where AI-assisted maintenance and generation tooling give less leverage. That does not change the migration timing if the disruption cost is genuinely high. It does change how the hold decision should be framed, as a time-limited position with a real plan attached rather than a permanent state of affairs.

Boostlingo's situation before we engaged illustrated this directly. Their stack was WebdriverIO rather than Selenium, but the profile was the same: built for an earlier era, rigid under modern conditions, and structurally incompatible with the AI workflows the team was already trying to use. The migration to Playwright was not the goal. It was what made everything else possible.

How ThinkSys looks at it:

• We run a cost model before recommending migration on any legacy estate. Migration disruption on one side, compounding the cost of staying, including the AI tooling constraint, on the other. The model drives the conversation, not framework preference.
• For teams where staying is the right call for now, new coverage goes on Playwright, and the existing Selenium suite is maintained but not extended. That stops the technical debt from growing without forcing a disruptive cutover before the timing is right.
• We put a date on the migration in that conversation, even if it is eighteen months out. Open-ended holds become permanent ones. A timeline keeps the decision alive and gives the team something to plan toward.

Migration Gets You Halfway. Architecture Gets You The Rest.

This is the part most framework comparisons skip entirely, and it is the part that determines whether a migration pays off or just moves the problem into a newer container.

Migration fixes surface symptoms quickly. The first month usually feels like success. Flaky timing failures drop, execution gets faster, and the team gets optimistic. Then the same deeper problems return because they were never framework problems to begin with. Brittle selectors, leaking test data, insufficiently isolated environments, and tests covering too much in a single path. These travel with the suite into whatever framework receives them.

The executive takeaway is not that Playwright eliminates these problems. It is what Playwright gives you a clean baseline to build the right architecture on, and what you build determines whether the gain lasts past the first quarter.

AI tooling introduces a specific new risk here. Teams that migrate to Playwright and immediately use AI tools to generate tests at volume can rebuild bad architectural patterns faster than they ever could manually. The AI accelerates whatever design philosophy is already in place. Sound philosophy compounds the benefit. Poor philosophy compounds the debt, quickly and at scale.

Boostlingo's outcome, 25% faster test script delivery without quality regression, came from treating the migration as an architecture project first. Copilot and Cursor were introduced after the foundational patterns were already in place, giving the AI tools something sound to generate against. That sequence mattered as much as the tools themselves.

How ThinkSys plans for migration:

• We run migration and architecture redesign as one project with one budget. The teams that separate them tend to complete the migration and defer the architecture work indefinitely, then wonder why the suite is fragile again six months later.
• Selector strategy is the first thing we lock down before any AI-assisted generation starts. Brittle selectors are the most common source of recurring flakiness, and the pattern AI tools will reproduce at scale if it is not addressed first.
• We establish isolated test data and environment patterns before migrating the test volume. The order matters. Tests migrated into a shared-state environment bring their failure modes with them.
• When AI-assisted scripting is part of the engagement, we define generation guidelines before the tools touch the codebase. What patterns to follow, what to avoid, and what requires human review before it ships. Unconstrained generation on an immature architecture creates a maintenance problem that looks like a framework problem and gets diagnosed as one.

So What’s the Best Framework?

The argument above is not trying to make this decision for you. It is trying to give you the inputs that most framework comparisons leave out.

Choose Playwright for any new browser automation work. The scaling behavior, team fit, ecosystem direction, and AI tooling compatibility all point the same way. It no longer needs to justify itself against the alternatives.

Stay on Selenium if you have a large functioning estate, and migration would genuinely harm roadmap execution more than the current suite pain does. Set a real migration timeline. Do not let the hold become permanent by default.

Choose Cypress only if your product surface is genuinely narrow and the workflow constraints will not become strategic problems as the product grows. Map the third-party and cross-origin coverage you will need over the next twelve months before committing to that conclusion.

In every case, put the AI tooling constraint explicitly into the decision. Which framework gives your engineers the most leverage from the tools they are already using? That question belongs in the framework selection conversation, not in a separate one held later.

Read also: How to choose the right testing framework in 2026

The Framework Is The Foundation. Everything Else Still Has To Be Built.

Choosing the right framework is the beginning of the decision.

The teams that hold the gains from a Playwright migration own a selector strategy, test data isolation, regression tiering, and flaky-test remediation with clear accountability. Without that, a better framework becomes the same maintenance problem running inside a faster runtime.

The teams that compound the gains pair the architecture discipline with AI tooling introduced deliberately, after the foundational patterns are in place, not before. The framework makes the AI effective. The architecture makes the gains durable. Neither works without the other, and the sequence between them matters.

Not sure which framework fits your team? Let's find out.

Book a call