Most teams collect testimonials either far too early or far too late. They ask at the moment of purchase, when the customer is hopeful but has no real experience to vouch for, or they ask months later during a renewal, when the early excitement has faded into routine. The end of onboarding sits in the sweet spot between the two: the customer has done the work of getting set up, they have seen the product deliver its first real result, and they feel the specific satisfaction of having gotten over the hump. That feeling is testimonial gold, and it has a short shelf life.
Onboarding is also the one phase where you have the customer's full attention. They are in regular contact with your team, they are actively using the product, and they are emotionally invested in making the adoption succeed. By the time that intensity settles into background routine, the window has narrowed. If you build the testimonial ask into the onboarding handoff, you capture the proof at its peak instead of trying to recreate it later.
Ask at the milestone, not the calendar date
"End of onboarding" should mean a milestone, not a fixed number of days. The right moment is when the customer hits their first real outcome — the first report generated, the first campaign sent, the first week run entirely on the new system. That is when they have felt the product work, not just finished configuring it. Tie the ask to that achievement: "You just sent your first batch through ProofShow — how did it go?" The question lands as genuine interest in their success, and the answer is often a testimonial in disguise.
If your onboarding has a formal completion step — a wrap-up call, a handoff from the implementation team to the account team, a "you're live" email — anchor the ask to that step. The customer already expects a moment of closure there, so a reflective question fits naturally instead of feeling like a sudden marketing intrusion.
Ask the person who did the work
In most onboardings there is one person who carried the implementation: the admin who configured the settings, the ops lead who migrated the data, the champion who pushed for the purchase internally. That person has the richest, most specific story, because they lived the transition from old way to new way. They know exactly what was painful before and what changed.
That contrast — before and after — is the backbone of a persuasive testimonial. The buyer can tell you the product looks good; the person who ran the onboarding can tell you "we used to spend two days a month reconciling this by hand, and now it takes twenty minutes." The second statement sells the next prospect, because it is concrete and earned. Address the request to the person who did the work, and you get the story worth quoting.
Ask about the change, not the product
The strongest onboarding testimonials describe a transition, so your question should invite a before-and-after, not a product rating. Replace "how do you like ProofShow?" with prompts that surface the change:
- "What did this process look like before you switched, and what does it look like now?"
- "What were you worried about during setup, and how did it actually turn out?"
- "What is the first thing you noticed once you were fully up and running?"
Each of these pulls a specific story instead of a generic compliment. The worry-versus-reality question is especially valuable, because it speaks directly to the doubts the next prospect is feeling. A customer saying "I was nervous the migration would be a nightmare, and it was done in an afternoon" disarms the exact fear standing between a reader and a purchase.
Use the relationship you already built
The advantage of asking at onboarding's end is that you are not a stranger reaching into a quiet inbox. The customer has been talking to your success team for days or weeks. The person making the ask is someone they already trust, which means the request carries warmth instead of feeling transactional. Have the onboarding contact make the ask directly — "it's been great getting you set up; would you be willing to share a sentence or two about how it went?" — rather than routing it through a generic marketing address. The existing rapport does most of the persuading.
Capture first, formalize later
As with any testimonial, separate getting the words from getting permission to publish. During the wrap-up conversation, simply ask the question and capture the answer — in the call notes, in a quick reply, in a short message. You now have the customer's genuine reaction in their own language. Only afterward do you go back and ask whether you can use it publicly, show them the exact wording, and confirm how they want their name and role to appear. The two-step approach keeps the initial ask feeling like a conversation rather than a contract.
Make it part of the onboarding runbook
The teams that consistently mine onboarding for proof do not depend on individual reps remembering. They add the testimonial ask to the onboarding completion checklist, right alongside the final training session and the handoff email. Once it is a standard step, every successful onboarding produces a candidate quote, and the library of before-and-after stories grows as fast as the customer base does.
The end of onboarding is the moment a customer stops hoping the product will work and starts knowing it does. That shift in conviction is precisely what makes a testimonial believable. Capture it while it is fresh, ask the person who earned it, and frame the question around the change they just lived — and the relief of crossing the finish line becomes proof that pulls the next customer across it too.