Khan Academy is completely free, run by a nonprofit, and contains actual teaching: video lessons plus mastery practice for every grade. IXL costs about $20 a month and contains, at first glance, practice problems. Put them side by side and the obvious question writes itself: why would anyone pay roughly $240 a year for the product with less in it?
Full disclosure before we try to answer that: we make Infinilearn, a free math RPG for grades 4-9, and you're reading this on Infinilearn's blog. We compete for some of the same after-school minutes both of these platforms do, so keep your guard up accordingly. We've tried to write the comparison we'd want as parents, including the parts where the honest answer is "use one of them, or both, and not us."
The short version: the puzzle dissolves once you see that IXL and Khan Academy are not two versions of the same product at different prices. They do different jobs. IXL is a precision practice instrument — the best skill-by-skill diagnostics and standards granularity you can buy. Khan is a free teaching library that also includes practice, but with coarser drilling and zero built-in accountability. Whether the paid job is worth $240 a year depends entirely on which job your child needs done.
What Each One Actually Contains
Khan Academy: instruction first, practice attached
Khan Academy's core asset is teaching. For every grade, there are video lessons that explain concepts step by step, followed by mastery practice that tracks whether the student has actually absorbed them. If your 7th grader hits two-step equations — a 7th grade skill under Common Core — and it turns out they never really nailed one-step equations from 6th grade, Khan can walk them backward to the missing lesson and re-teach it, for free, at 9 p.m. on a Tuesday. No paid product on this page can do that, and most paid products anywhere can't do it as well. It is, plainly, the best free instruction available.
What Khan is not is a drilling machine. The mastery practice is real and reasonably adaptive, but it isn't built around isolating one narrow skill and hammering it with a deep well of problems until it's automatic. And nothing in Khan pushes. There's no subscription to justify, no score a parent is checking by default, no consequence for skipping a week. It's a library. Libraries are wonderful, and libraries do not chase your child down the hall.
IXL: practice, measured to the decimal
IXL is a comprehensive K-12 skill-practice platform. Every topic is broken into its own practice strand, aligned precisely to Common Core standards — one-step equations (6th grade), two-step equations (7th), linear functions (8th) each get their own dedicated strands with deep problem sets behind them. The diagnostic is the best reason IXL exists: it pinpoints a student's working level in each strand of math, not just an overall grade level, and keeps refining as they practice. When a parent says "I know something's wrong in fractions but I can't tell what," IXL is the tool that answers the question.
What IXL is not is a teacher. There's no library of lessons walking your child through a concept they've never met. It assumes instruction happened somewhere else — school, a tutor, Khan — and its job is to measure and cement it. It's also not a game and doesn't pretend to be: question, answer, next.
The Student Experience, Honestly
IXL and the SmartScore loop
Every IXL skill has a SmartScore that climbs toward 100 as a student answers correctly — and a wrong answer near the top wipes out a large chunk of progress. A careless slip at 94 can undo several minutes of work in one click. Some kids treat that like a game score and grind it back up; the checklist kids who love progress bars can genuinely thrive here. But plenty of others find it crushing, and if you've heard another parent mention "IXL tears," this loop is what they're describing. The practice itself is excellent. The emotional experience of the practice is the thing to watch, especially with a child who already has a fraught relationship with math.
Khan and the second-school-day problem
Khan's failure mode is quieter. Watching a math video after a full day of school feels, to most middle schoolers, like a second school day — and because Khan asks nothing of anyone, it's easy to simply not do it. There's no external accountability anywhere in the system: no deadline, no streak a teacher sees, no report a parent gets unless they go looking. Khan works beautifully for the self-motivated student and for the family where a parent sits nearby. For the average 12-year-old handed a Chromebook and told "go do Khan," the most common outcome is that no Khan occurs. We saw the same dynamic when we compared Khan Academy vs Prodigy: Khan wins every content comparison and loses most voluntary-use comparisons.
The Cost Math Over a Year
IXL's family subscription runs about $20 a month as of this writing — roughly $240 over a school year. Khan Academy is $0, permanently, as a matter of nonprofit mission rather than a free tier waiting to upsell you.
So what does the $240 actually buy? Three things Khan doesn't offer at the same depth: the diagnostic that locates gaps strand by strand, practice granular enough to target exactly one standard at a time, and reporting precise enough that you can watch a specific weakness close over a period of weeks. If you'll use those three things, $240 is a fair price; it's a fraction of what a semester of tutoring costs. If you won't — if what you really need is explanation, or if the subscription would become a monthly fee for a website nobody opens — the money is better kept. We've collected the no-cost versions of IXL's job in our roundup of free IXL alternatives.
IXL vs Khan Academy at a Glance
| IXL | Khan Academy | |
|---|---|---|
| Price | About $20/month (family plan) | Free (nonprofit) |
| Core job | Precision practice and measurement | Instruction, with practice attached |
| Instruction | Minimal — assumes teaching happened elsewhere | Video lessons for every grade; its main strength |
| Practice style | Skill-by-skill drills, deep problem sets per standard | Mastery practice, less granular drilling |
| Diagnostics | Excellent — pinpoints level per strand | Mastery tracking, coarser |
| Accountability | SmartScores and parent-visible reports | None built in; runs on self-motivation |
| Biggest risk | SmartScore frustration, outright refusal | Quietly never gets used |
Who Should Pay for IXL — and Who Shouldn't
- Pay if your child is self-motivated or grade-anxious: the diagnostic reads as respect, the SmartScore reads as feedback, and the precision genuinely accelerates them.
- Pay if you're on a specific mission: a placement test in the spring, a known gap in proportional reasoning, a summer catch-up plan with a defined end date. IXL is at its best as a targeted instrument, not a lifestyle.
- Pay if you'll actually read the reports: half of IXL's value is in the analytics. A subscription nobody monitors is half wasted on day one.
- Don't pay if the problem is understanding: a child who doesn't get the concept needs teaching first, and Khan does that better than IXL does — for free.
- Don't pay if the problem is willingness: IXL's drill format is exactly what practice-resistant kids resist, and assigning it can become a nightly negotiation. (The same logic applies when weighing it against a game — see our IXL vs Prodigy comparison.)
- Don't pay if the budget is tight: Khan's mastery practice, while less granular, covers the baseline job at $0, and free alternatives cover most of the rest.
The Quiet Best Answer: Pair Them
The framing of this article is a versus, but the strongest setup for a motivated student is both, in sequence. New concept: Khan teaches it. Then IXL drills it and tells you, precisely, whether it stuck. When IXL's diagnostic surfaces a gap two grade levels down, Khan re-teaches that skill for free. Each platform covers exactly the other's blind spot — Khan supplies the instruction IXL assumes, IXL supplies the granularity and measurement Khan lacks. Families doing serious catch-up work or placement prep often land here, and it costs the same $240 as IXL alone.
The pairing has one honest prerequisite: a student who will actually sit down and do it, or a parent willing to sit with them. Neither platform solves willingness. Which brings us to the last case.
When the Real Problem Is That They Won't Open Either
Both IXL and Khan assume the child will show up. If every session of either one turns into a standoff — if the actual problem in your house is not instruction or measurement but the fact that no voluntary math happens at all — then the format is the problem, and neither a better drill nor a better video fixes format.
This is the one situation where we'll mention our own product, with the bias warning restated. Infinilearn is a free fantasy RPG for grades 4-9 where every attack, spell, and ability is powered by solving a real math problem matched to Common Core standards. The adaptive engine tracks accuracy topic by topic, and weapon attacks pull problems from the student's weakest subjects — so a kid who is shaky on proportional relationships simply meets more proportion problems mid-battle, without anyone assigning anything. The entire game is free: every zone, quest, and boss, all of the grades 4-9 math, no ads, and the free parent dashboard shows accuracy by topic for one child. Honest limits: it's practice, not lessons (it cannot replace Khan's instruction), problems are multiple choice, it's browser-only, and it doesn't cover kids below 5th grade. Its job is narrower than either platform above: getting a reluctant middle schooler to do real practice on purpose.
The Bottom Line
Stop comparing IXL and Khan Academy as rivals; they're answers to different questions. If the question is "who will teach my child this concept?", Khan Academy — free, and better at instruction than most paid products. If the question is "exactly where are the gaps, and how do we drill them shut?", that's IXL's job, and for a self-motivated student or a targeted mission, it's worth about $240 a year. If the question is "how do I get this kid to practice at all?", neither one answers it — solve the willingness problem first, with a format your child doesn't fight, and add the library or the drill bench once math is actually happening.