SaaS customer acquisition cost: the real numbers from the community
When you're building your business model, you quickly run into the same question, how much does a customer really cost. Studies from big companies give clean numbers that are often inflated and disconnected from reality. Here we did the opposite, we collected 74 real amounts that founders share on Reddit and X. The result, the median CAC for a SaaS sits around 138 € per customer, across all channels, but the gap from one channel to another is huge. Here is the detail, channel by channel, more raw and much closer to what you will actually experience.
By Mathéo Ballasse · July 1, 2026
~138 €
Median CAC for a SaaS, across all channels
74
CAC figures collected (Reddit, X)
~92 €
the cheapest channel, "Paid advertising"
CAC by channel
Customer acquisition cost by channel, ranked from cheapest to most expensive. Figures in euros, see the methodology.
| Channel | CAC | Why |
|---|---|---|
| Paid advertising | €92 | Median of 34 figures shared by founders. Most fall between 37 and 428 € per customer. |
| SEO & content (blog) | €111 | Median of 5 figures shared by founders. Most fall between 8 and 184 € per customer. |
| Word of mouth / referral | €138 | Median of 4 figures shared by founders. Most fall between 138 and 1058 € per customer. |
| Cold email | €368 | Median of 5 figures shared by founders. Most fall between 184 and 552 € per customer. |
What these numbers really tell us
The gap is huge from one channel to another, from "Paid advertising" around 92 € per customer up to the most expensive channels, several hundred to several thousand euros. The pattern is the same everywhere, channels that rely on trust or an audience that already exists cost a fraction of those where you pay for attention.
What changes here is the source. These are not smoothed-out averages from a tool vendor who has an interest in selling you a channel, these are founders giving their real number, often while complaining or being surprised. It is noisier, but it is real.
Why the range is so wide
For the same channel, you will see one founder at 30 € per customer and another at 400 €. This is not an error, it is the reality on the ground. CAC depends first on your product, your price, your market and your execution ability, far more than on the channel itself.
That is why a single median figure is not enough. Look at the range, place yourself within it, and above all compare your CAC to what a customer brings you. A high CAC can be excellent if the customer's lifetime value far exceeds it.
How to use this for your business model
Take these numbers as orders of magnitude to build your hypotheses, not as a promise. Choose one or two realistic channels for your target audience, set a CAC range from this table, and check that the ratio between a customer's lifetime value and their acquisition cost holds up (a minimum of 3 to 1 is healthy).
After that, the only data that really matters is your own. Calculate your own CAC channel by channel from your very first spend, and focus your budget where the ratio holds up for YOUR SaaS.
Your tailor-made acquisition plan
We read your SaaS and hand you a complete plan: who to target, which channel, what to do.
Methodology
We gathered 74 customer acquisition cost (CAC) figures shared PUBLICLY by founders on Reddit and X (plus a few blogs), from 63 distinct sources. These are NOT survey data, they are self-reported amounts, sometimes rounded, often tied to a specific context. We only keep figures expressed PER customer acquired (not per lead), we convert everything to euros (1 $ ≈ 0.92 €, 1 £ ≈ 1.17 €), we discard outliers, and we display the MEDIAN per channel (plus a range). The figures are orders of magnitude, not guarantees, and the wide range reflects the fact that CAC depends first on your product and your target audience. Sample growing with each update.
Sources
- Paid advertising, ~428 € per customer. " The CAC comparison after 16 months is dramatic. Paid channel: $44,640 spent acquiring 96 c " (Reddit, 2025)
- SEO & content (blog), ~8 € per customer. " The CAC comparison after 16 months is dramatic. Paid channel: $44,640 spent acquiring 96 c " (Reddit, 2025)
- Word of mouth / referral, ~138 € per customer. " Partner/Referral: ~$150. Inbound/Content: ~$200. Paid Ads: ~$350. Outbound (Cold): ~$400 to $ " (Reddit, 2026)
- Direct sales / outbound, ~368 € per customer. " Partner/Referral: ~$150. Inbound/Content: ~$200. Paid Ads: ~$350. Outbound (Cold): ~$400 to $ " (Reddit, 2026)
- Events / conferences, ~460 € per customer. " Partner/Referral: ~$150. Inbound/Content: ~$200. Paid Ads: ~$350. Outbound (Cold): ~$400 to $ " (Reddit, 2026)
- Cold email, ~184 € per customer. " and with automated infrastructure + no sales reps, CAC stayed under $200/customer. " (Reddit, 2026)
- Other, ~138 € per customer. " SMB SaaS (150 to $250 CAC) moves fast, while Enterprise (800 to $1,500+ CAC) has long, compl " (Reddit, 2026)
- Cold DM (LinkedIn/X), ~5 € per customer. " We see 40 to 60 percent reply rates on LinkedIn, two to five times more performance than t " (Reddit, 2026)
- Influence & partnerships, ~138 € per customer. " The Optifai data ($150 CAC for partners vs. $400+ for outbound) really highlights that mos " (Reddit, 2026)
To estimate your own cost per channel, use the channel cost calculator.