Where to find customer language (the full source list)

Joanna Wiebe read 500 Amazon reviews for 6 books about alcoholism. She found one sentence from a reviewer: “If you think you need rehab. You do.”

She used that sentence as a headline for a rehab center landing page. CTA clicks went up 400%. Each patient was worth $40,000. One sentence. From one review. Found in a place most copywriters never look.

That is a voice of customer example. And it did not come from a brainstorming session or a customer interview. It came from reading what real people actually said.

The question is: where do you find sentences like that?

Here are 7 sources. Each one gives you something different.

1. Reddit threads (the raw unfiltered language)

Reddit is the best source of voice of customer data for copywriting. Not because it has the most users. Because people on Reddit write like they TALK. No filter. No corporate speak. No trying to impress anyone. (I wrote a full Reddit mining tutorial with the exact search strings and thread types to look for.)

A copywriter on Reddit described it this way:

“Tools like Google Analytics show you the behavior (what they did on your site). But communities like Reddit show you the mindset and the exact language they use to describe their pain points and questions. This language is gold for ad copy. Headlines. And content that truly resonates. Because it mirrors the customer's internal dialogue.”

What to look for: Complaints. Rants. Recommendations. “Has anyone tried...” threads. “I am so frustrated with...” posts. The comments are where the gold is. Not the posts themselves.

How to search: Go to a subreddit where your audience hangs out. Search for the problem. The product category. The competitor names. Sort by top posts of all time. Read the top 20 threads. Copy every quote that sounds like a real person describing a real pain.

Voice of customer example from Reddit: “Have you got any advice on where to find good voice-of-customer data outside of reviews? I had a little look on Reddit but it's tough to know what subreddits are 'right' and I feel like I'm missing most of the good stuff.”

That quote tells you everything about this person's pain. They know research matters. They do not know WHERE to look. That is your headline.

2. G2 and Capterra reviews (the competitor intelligence)

G2 has over 2 million verified software reviews. Capterra has another 2 million+. Each review is a person explaining what they love and hate about a product they actually paid for.

What to look for: 1-star and 5-star reviews. Skip the 3-star reviews. They say nothing useful. The extremes are where the real voice of customer language lives. 1-star reviews tell you the pain. 5-star reviews tell you the desired outcome.

Voice of customer example from G2: “Chattermill is great for understanding all those different customer voices at scale. But you do have to spend a lot of time training the models and tagging things correctly at the beginning. It's not an out-of-the-box magic button.”

That quote gives you an objection (“not a magic button”) and a pain point (“spend a lot of time training the models”). Both are copy-ready.

3. Amazon reviews (the emotional language)

This is where Joanna Wiebe found the rehab headline. Amazon reviews work because people write them AFTER experiencing something. The emotion is fresh. The language is specific.

For the SweatBlock case study Copyhackers mined 5,000 Amazon reviews. They found phrases like “sweat soaker undershirt” that no copywriter would invent in a brainstorming session. The result: 108% lift in homepage revenue.

What to look for: Books about the problem your audience has. Products your audience buys. Competing products. Read the long reviews. Not the short ones. Long reviews have stories. Stories have language.

How to use it: Search Amazon for books in your niche. Filter by 4-star and 5-star reviews (people who loved the book explain WHY in their own words). Filter by 1-star (people who hated it explain what they ACTUALLY wanted).

4. YouTube comments (the unguarded reactions)

YouTube commenters are brutally honest. They say things they would never put in a survey. They argue. They share personal stories. They tag other people.

What to look for: Comments on videos about the problem you are writing about. Tutorial videos. Review videos. “How to” videos. The comments that start with “I have been struggling with this for...” or “Finally someone explains...” are voice of customer gold.

How to search: Search YouTube for your topic. Watch the top 3-5 videos. Read 50+ comments per video. Copy every comment that describes a pain. A desire. A frustration. An “aha” moment.

5. Trustpilot and review sites (the complaints)

Trustpilot reviews are different from G2 reviews. G2 reviewers are professionals evaluating software features. Trustpilot reviewers are people venting. The language is angrier. More emotional. More raw.

Voice of customer example from Trustpilot: “Very expensive. Starts of indicting that the packages are cheaper but the price keep increasing significantly. Transcripts are poor and I've even had Otter transcribe an entire 2 hour+ meeting then loose the entire transcript. Summaries are inconsistent and vary from good to awful.”

That one review gives you: a pricing objection. A quality complaint. An emotional word (“awful”). And the specific pain of lost data. Four voice of customer data points. One review.

6. Forums and communities (the peer conversations)

Facebook groups. Slack communities. Discord servers. Industry-specific forums. These are where people talk to EACH OTHER. Not to a brand. Not to a survey. To each other.

What makes forums different: People give advice in forums. When someone says “I tried X and it worked” that is counter-evidence for an objection. When someone says “I switched from Y to Z” that is a buying signal. When someone says “I have been doing this for 3 years and the biggest mistake I made was...” that is a pain point with credibility built in.

How to find them: Search Google for “[your niche] forum” or “[your niche] community ” or “[your niche] slack group.” Join 3-5. Lurk. Read. Collect.

7. Blogs and comment sections (the expert + audience combo)

Blog posts tell you what the experts think. Blog COMMENTS tell you what the audience thinks about what the experts think. That gap is where your copy lives.

A copywriter described the complete source list they use:

“Some of the resources I use: Amazon Reviews. Walmart Reviews. Quora. Q&A Forums. Reddit Forums. Google Ads Keyword Planner. Semrush. SpyFu. SEO and PPC Research and Analysis. Social Media Advertising Analysis.”

You do not need all of those. But you need MORE than one. Each source type gives you a different angle on the same audience.

The voice of customer data framework

Here is what to collect from each source. (These categories map directly to the 23 sections every research brief should have. For the full 5-question voice of customer framework with a 30-minute method see the companion article.)

Pain points. What frustrates them? What words do they use when they are angry? (“Exhausting.” “Nightmare.” “Grunt work.”)

Desired outcomes. What do they want instead? (“Makes my job so much easier.” “The copy almost writes itself.” “Like a mind reader.”)

Objections. What stops them from buying? (“Too expensive.” “I do not trust AI.” “I do not need a dedicated tool.”)

Buying signals. What do they say when they are ready to act? (“Does anyone recommend...” “I am comparing X and Y...” “I am looking for...”)

Emotional language. The specific words that carry the most weight. These become your headlines.

The math on finding voice of customer examples

7 source types. 5-10 quotes per source. That is 35-70 raw quotes.

At $100/hr and 4-8 hours of manual mining that is $400-$800 per project. Just to find the words.

But those words are what make the difference between $3K copy and $10K copy. A copywriter on Reddit said it plainly:

“I think the most important thing you can learn as a copywriter is how to do Voice of Customer research. This is where you research your customers and prospects to understand their emotional drivers. Their motivations. Their struggles. Their beliefs and biases. And you're looking to capture the actual words they use to describe their situation so that you can mirror them back. It's so you can create a mirror of their mind with your copy.”

A mirror of their mind. That is what voice of customer examples give you. Not your words. Theirs.

The sources are free. The language is sitting there. The only question is whether you go find it.

If you want the full step-by-step process for collecting and organizing voice of customer data: that is the companion article. It covers the 7 steps from sourcing to brief.