How to start a Real Outcomes Aggregator for Tutoring Platforms business: plan and growth

Someone has paid for Preply for five months and can't tell if it's worth it. There's no way to compare real effectiveness and price across dozens of platforms.

A business built on a complaint people already posted in public.No. 029

An owner can start “Real Outcomes Aggregator for Tutoring Platforms” from a complaint people already posted. The offer, in one line: Compare tutoring platforms by cost per CEFR level gained, from learners' self-reported progress. It is for language learners. Charge affiliate referrals, and test a price at no charge to the user. Begin in more than one country. Buyers already talk about this in r/languagelearning. One thread gathered 43 votes and 64 replies across Sep 14, 2026 – Oct 14, 2026. Use that room to meet the first twenty buyers. Do not export it, and do not republish the posts. The idea, the evidence, and the market estimate on this page are free to read. Two paid prompts finish the job: one drafts the offer, the price, and a ninety-day calendar; the other drafts a month of conversations and proof. One credit unlocks both. A software specification is not on this site. When the company is the product itself, a single link further down opens the founder library.

Is Preply worth it in 2026?
r/languagelearning · Sep 14, 2026 – Oct 14, 2026 · 43 votes · 64 replies · Open the thread

Who would pay

Language learners. Start in more than one country, and charge affiliate referrals, testing a price at no charge to the user.

The thread above is the public complaint this business can learn from. Verbatim quotes are not invented. Further sources, when a later report adds them, stay with the evidence.

What buyers use today

  • Platform star reviews
  • Reddit threads

The offer, in our words

An independent aggregator of learner self-reports (months from A2 to B1) across platforms and tutors that computes 'cost per level', not star reviews.

Score 2.80, Simmering. Pain, willingness to pay, demand, and the gap in current options drive it. We are not scoring how fast you can code.

Market size

An estimate, built from the bottom up: real customer counts × a realistic price. It shows the size of the prize, not a forecast.

TAM Total addressable

$140M a year

7M learners · 5% of monthly language-app learners (Duolingo alone)

SAM Serviceable

$28M a year

1.4M learners · English-speaking

SOM Obtainable in 3 years

$280K a year

14,000 learners · 1% of the reachable segment in three years

What that means

14,000 learners a year × ~$20 = $280K a year in revenue

Low confidence · estimated Oct 2026

How we estimated this
  1. Base: 140,600,000 monthly language-app learners (Duolingo alone).
  2. Has the problem: 5% (assume 5% book a tutor in a year).
  3. Revenue per learner: $20 per year (~$20 affiliate revenue per booking learner).
  4. Reachable: 20% (English-speaking).
  5. Three-year capture: 1% of the reachable segment.

TAM is customers with the problem × revenue per customer. SAM is the part a new business can reach. SOM is a cautious three-year share of SAM. The bars use a log scale. A share marked “assume” is our judgment, not a measurement.

Source: Duolingo Q2 2026 shareholder letter

The business-plan prompt

The offer, the price, and a ninety-day calendar, written for an agent. 1 credit unlocks both prompts for this idea: this plan and the growth playbook below.

plan.md · 615 words
# Business plan prompt: Real Outcomes Aggregator for Tutoring Platforms

You are writing a practical plan for one owner who will sell this as a business. Do not write a software specification, a venture memo, or a feature list. Use short sentences. Where a number is unknown, give a range and say what to measure.

## The business
Working name: Real Outcomes Aggregator for Tutoring Platforms
What the customer gets: Compare tutoring platforms by cost per CEFR level gained, from learners' self-reported progress.
Who pays: Language learners

Locked · the first lines are above

Unlock both prompts for this idea · 1 credit ($9.99)

One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.

Sign in once with your Real Startup Ideas account; the same credits work on both sites.

Packs from $4.90 a credit, or $499 a year for everything

Presented by — this line is open to one sponsor, $79 a week →

The growth playbook

Thirty weekdays of conversations and proof. Not an ad plan. Included with the plan above, on the same credit.

growth.md · 459 words
# Growth prompt: Real Outcomes Aggregator for Tutoring Platforms

You are planning thirty days of distribution for a business that already has an offer. The offer: Compare tutoring platforms by cost per CEFR level gained, from learners' self-reported progress. The buyer: language learners. Price band: at no charge to the user.

Do not propose ads, a viral loop, or a rebrand. Propose conversations, proof, and a repeatable weekly rhythm.

## Starting point
A public thread in r/languagelearning drew 43 votes and 64 replies. The pain, in the owner's words: Someone has paid for Preply for five months and can't tell if it's worth it. There's no way to compare real effectiveness and price across dozens of platforms.

Locked · the first lines are above

Unlock both prompts for this idea · 1 credit ($9.99)

One credit opens the business plan and the growth playbook together, for good. Credits work on both businessideastobuild.com and realstartupideas.com.

Sign in once with your Real Startup Ideas account; the same credits work on both sites.

Packs from $4.90 a credit, or $499 a year for everything

Questions

How much money do I need to start?

Enough to talk to buyers and deliver the offer once. A service version can start with a written process and a way to take payment. A software version is a larger bet and is not required to test the price. The band to test is Free to the user.

How should I price it?

Test a price at no charge to the user, charged as affiliate referrals. Raise it after three paid pilots, not before the first conversation.

Where do the first customers come from?

r/languagelearning is the clue. A related thread gathered 43 votes and 64 replies. Show up there, follow the room's rules, and ask for conversations. Do not scrape it.

Do I need to write code?

No. The prompts on this page draft a plan and a month of growth. Code is a later choice. The founder site linked once below is where the build document lives, if you want it.

A separate site sells the agent build document and can build the product. Get the build PRD

A two-week build starts at $10,000 on that site, after a $1,000 scoping fee.

Plans and growth playbooks

One credit opens both prompts for this business.

The idea, the evidence, and the market estimate stay free. The business plan and the thirty-day growth playbook for Real Outcomes Aggregator for Tutoring Platforms cost one credit, together, and stay unlocked.

Credits work on both businessideastobuild.com and realstartupideas.com. Sign in once with your Real Startup Ideas account; it is the same wallet.

The agent PRD for this idea is on Real Startup Ideas →

Also in Language Learning

The whole niche →