If you want to find your Myers-Briggs type, the free 16Personalities assessment is the usual starting point. If you want your Enneagram number, Truity's free test will get you close. Neither costs anything, both take about twelve minutes, and that is enough to begin with. The rest of this page covers which paid options are worth it, how to tell whether your result is right, and the question a lot of Christians reasonably ask before they take one at all.
Where to Take a Myers-Briggs Assessment
16Personalities is the free test almost everybody has actually taken. It gives you four letters plus a fifth, and that fifth letter is worth understanding before you read too much into it. The A or T on the end of a result like INFJ-A is 16Personalities' own measurement, not part of the Myers-Briggs framework at all, and it tracks something closer to how much stress you were carrying that week.
MBTI Online is the official paid assessment, from the company that publishes the actual instrument. What the money buys is a more carefully constructed questionnaire and a fuller report, and in some formats a conversation with a certified practitioner. If you're using this for hiring, team development or counselling, use the official one. If you're using it to understand yourself better, the free version is fine.
Truity's TypeFinder is a third option, free to take with a paid detailed report, and it tends to explain the underlying preferences more clearly than 16Personalities does.
Where to Take an Enneagram Assessment
The Enneagram is harder to test for than Myers-Briggs, because it types you by your core motivation rather than by your behaviour, and motivation is exactly the thing people are least accurate about in themselves. Expect any Enneagram test to get you into the right neighbourhood rather than to the right door.
Truity has a solid free Enneagram test and it's the one to start with.
The Enneagram Institute's RHETI is the paid standard, from the organisation that developed much of the modern system.
The iEQ9, from Integrative Enneagram Solutions, is the more expensive professional option, and it's the one you'll be pointed at from most Enneagram coaching.
Your Enneagram Coach is worth knowing about if the framework's spiritual origins concern you, because it presents the whole system inside an explicitly Christian frame.
How to Tell Whether Your Result Is Right
This is the part most pages skip, and it's the part that saves you from building on a wrong answer.
Read two or three type descriptions, not just yours. A good test result should feel obvious rather than flattering. If your assigned type reads as a compliment and the one next to it reads as uncomfortably accurate, trust the uncomfortable one.
Watch for the mistype that comes from answering as who you're trying to be. Everybody does some of this. The way round it is to answer as you were at home last week, not as you are at work when you're doing well.
Ask somebody who lives with you. Read them the two candidate descriptions without saying which one the test gave you.
Give it a few months. People commonly retest into a neighbouring type once, then settle. That's normal, and it's an argument for not making any large decision on the strength of a first result.
Should Christians Use These at All?
It's a fair question and it comes up more with the Enneagram than with Myers-Briggs, largely because of where the Enneagram came from and who popularised it.
The short version of our position: these are descriptive tools, not doctrine. A framework that helps you notice you avoid conflict, or that you've been treating being needed as proof you're loved, is doing the same work as an honest friend. It has no authority over what God asks of you, it cannot set a ceiling on who you become, and it is not a source of spiritual truth.
Where it goes wrong is when the type stops describing you and starts excusing you. "That's just how I am" is where a useful description turns into a problem.
We've written that argument out properly, with the objections taken seriously, in should Christians use the Enneagram and the MBTI as a resource for Christian growth.
What to Do Once You Have a Result
Don't stop at the description, because the description is the least useful part and it's all most sites offer.
The question worth asking is what your particular wiring does to the way you follow Jesus. Which spiritual practices fit you without a fight, which ones you avoid and why, and what your specific version of getting it wrong looks like.
That's what the rest of this site is for. Every Myers-Briggs type has a piece on what connecting with Jesus tends to look like for that type, anchored in a passage rather than in advice, and every Enneagram number has one too.
Myers-Briggs: INFJ · INFP · INTJ · INTP · ENFJ · ENFP · ENTJ · ENTP · ISFJ · ISFP · ISTJ · ISTP · ESFJ · ESFP · ESTJ · ESTP Enneagram numbers: 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 Enneagram centers: Gut · Heart · Head
Take the free one, sit with the result for a week, and then go and read what it means for how you pray.