# Mandelbaum.ai

Aiolum story: https://aiolum.com/story/mandelbaum-ai/ · added 2026-11-06 · updated 2026-11-06

**In short.** Mandelbaum.ai (AI semantic product search for online shops, Germany): Live with paid plans since 2024, November 2026. Evidence grade E: no revenue figure was checked. Team: 2 founders, Carl Hartmann and Tim Raderschad, both managing directors; headcount not published. Launched March 2024; still running.

AI semantic product search for online shops · Germany · AI-native · team of 2 to 10 · still running · group: Operations, logistics and trades

- Outcome: Live with paid plans since 2024, November 2026 (evidence grade of the headline number: E; no revenue figure)
- Launch: March 2024; months from launch to the outcome: 32
- Team: 2 founders, Carl Hartmann and Tim Raderschad, both managing directors; headcount not published
- Outside funding: Angel investment from the founders of the agency Dynabase (amount not published; podcast, May 2026)
- Main factor: Distribution
- Meters, 1 to 4: evidence strength 1, copyable pattern 2, capital needed 2
- Tags: AI-native, Small team, Funded, Running, B2B, E-commerce

Links:

- Visit mandelbaum.ai: https://mandelbaum.ai/

**The product.** A search box for online shops that understands what the shopper means, not only the words typed. A crawler reads the shop's catalog, or the shop installs a Shopify or Shopware app or sends a product feed, and the widget replaces the shop's own search. The model runs on the company's own servers in Germany.

**Why it worked.** Two employees of a Cologne e-commerce agency saw that shop search was one of the weakest parts of their clients' shops. They built the first versions inside the agency, tested them with agency clients, and took the first customers from the agency's network before they spun the product out as its own company.

Evidence grades: A = disclosed by a public company, a filing or a payment processor, or verified by one; B = two or more independent reports agree, or a journalist confirmed it; C = a founder claim that no one else verified; D = reported, not verified: one founder claim or a third-party estimate with no second source; E = no revenue figure found, so the headline is a non-money fact and the other facts carry their own grades; calc = computed on this page from graded facts.

## Summary

Mandelbaum.ai sells semantic search for online shops. Semantic search compares the meaning of a query with the meaning of each product description, so a shopper who types "something to keep my legs warm in winter" can be shown thermal trousers even though the words do not match. The shop pastes its address, a crawler indexes the catalog, and a widget for Shopify, Shopware or any site shows the results. The company says it runs its own embedding model, a model that turns text into lists of numbers so that similar meanings get similar numbers, on its own servers in Nuremberg.

Carl Hartmann and Tim Raderschad were employees of the Cologne agency Dynabase, where the first versions were built. The site was live with a free plan and a paid plan by March 2024. On 1 April, a month before the Happy Bootstrapping podcast published their interview on 4 May 2026, they spun it out as Mandelbaum GmbH, with the two of them as majority owners and the agency's founders as angel investors.

No revenue figure was found, so this story has grade E. What is checked: the company register entry in the imprint, prices on archived copies of the site, and the founders' own account of their customers and technology in the podcast.

## Pricing

Mandelbaum.ai prices in November 2025, from an Internet Archive copy of the home page (grade C); converted at the US Federal Reserve rate of US$1.1163 per euro (H.10, 30 October 2026)

| Plan | Per month, billed yearly (US$) | Per month, billed monthly (US$) | Limit |
|---|---|---|---|
| Free |  | 0 | rare catalog updates (yearly), limited speed |
| Basic |  | 26.79 | 24 euros; monthly catalog updates |
| Standard |  | 102.70 | 92 euros; daily catalog updates; marked Most Popular |
| Enterprise |  | custom | real-time updates, own trained model, SLA |

The live page on 6 November 2026 loads its plan cards by script; without the script it shows only the Enterprise plan ("Individuell", custom). The /start page says "Für immer kostenlos" (free forever, translation). In the podcast of May 2026 the founders say they bill by conversions in fixed tiers, so these 2025 prices may have changed. Plans are monthly and can be cancelled at any time; no yearly price is published.

## How much revenue does Mandelbaum.ai make? The numbers, graded

A two-founder spin-out of a Cologne agency, live with paid plans since 2024; no revenue figure published

| Fact | Value | Grade | Note | Sources |
|---|---|---|---|---|
| Company | Mandelbaum GmbH, Cologne, Amtsgericht Köln HRB 127713 | C | Imprint of mandelbaum.ai, read 6 November 2026. Managing directors: Carl Hartmann and Tim Raderschad. | [3] |
| Spin-out | 1 April (year not stated; the episode is dated 4 May 2026) | C | Podcast: "haben am 1. April Mandelbaum als GmbH ausgegründet" (on 1 April they spun Mandelbaum out as a GmbH, translation). | [1] |
| Ownership and funding | founders hold the majority; the agency's founders are angel investors | C | Podcast: "Heute halten die beiden die Mehrheit, die Agentur-Gründer sind als Angel-Investoren dabei" (today the two hold the majority, the agency founders take part as angel investors, translation). No amount is given. | [1] |
| First public site | March 2024 | C | Earliest Internet Archive copy, 29 March 2024, with a free plan, a Basic plan and an Enterprise plan. The first versions were built earlier inside the agency (podcast); no date is given. | [4, 1] |
| Prices, November 2025 | Free 0 euros, Basic 24 euros, Standard 92 euros a month, Enterprise on request | C | Internet Archive copy of 9 November 2025. In March 2024 there were Free, Basic at 24 euros and Enterprise. | [5, 4] |
| Pricing model, May 2026 | billed on conversions, in fixed tiers | C | Podcast: "Mandelbaum rechnet stattdessen auf Conversions ab, in festen Tiers" (Mandelbaum bills on conversions instead, in fixed tiers, translation). The live home page says "Ein Preis. Pro Monat." (one price per month). | [1, 2] |
| Flagship customer | Foto Leistenschneider, about 25,000 products on Shopware | C | Founders in the podcast. The sports brand Ryzon became a pilot customer after a talk at its run club. | [1] |
| First customers | through the agency network of Dynabase | C | Podcast: "Die ersten Kunden kamen über das Agenturnetzwerk von Dynabase". Later: trade fairs such as E-Commerce Berlin Expo and Didacta. | [1] |
| Model | own fine-tuned open-source model on its own GPU server in Germany | C | Podcast: the founders moved away from external API providers; they started with an OpenAI wrapper. The home page says "Kein OpenAI-Proxy" and hosting in an ISO 27001 data center in Nuremberg. | [1, 2] |
| Integrations | crawler, Shopify app, Shopware, product feed, JavaScript snippet | C | Podcast and home page. | [1, 2] |
| Revenue | not published | C | No source read gives revenue, customer counts or headcount. | [1, 2] |
| Time from the first public site to November 2026 | 32 months | calc | Calculated: March 2024 to November 2026. | [4, 2] |

How to read this table: a grade C value is the company's own statement, on its website or in a podcast interview. A grade A value is official data from a public body. A "calc" value (grade X) was computed on this page. No revenue figure exists in any source read.

## When did Mandelbaum.ai launch, and how did it grow? Timeline

From an agency project to its own company in about two years. Each entry carries its grade.

- **Before 2024** (grade C [1]): The first versions are built inside the Cologne e-commerce agency Dynabase and tested with agency clients, first on OpenAI.
- **29 March 2024** (grade C [4]): Earliest archived copy of mandelbaum.ai: a free plan, a Basic plan at 24 euros a month, and Enterprise.
- **9 November 2025** (grade C [5]): Archived copy: four plans, with Standard at 92 euros a month marked Most Popular, and "Hosted in Germany".
- **1 April 2026** (grade C [1, 3]): Spin-out as Mandelbaum GmbH; the two founders hold the majority, the agency's founders are angel investors. The podcast gives the day without a year.
- **4 May 2026** (grade C [1]): Happy Bootstrapping episode 170: own model on own GPU server, billing on conversions, first customers from the agency network.
- **6 November 2026** (grade C [2, 6]): The site is live, in German, with a free demo and an Enterprise plan; other plan cards load by script.

## Why did Mandelbaum.ai work?

### Customers from the agency

The product grew inside an agency whose clients run online shops. Those clients were the first test users and the first customers, so the founders did not have to find buyers from zero.

### Setup without a developer

The shop pastes its address, a crawler indexes the catalog, and the widget goes in with one click on Shopify or Shopware or as a snippet elsewhere. The home page says this takes about 5 minutes.

### Data stays in Germany

The founders replaced an external model provider with their own model on their own server. They told the podcast this was faster, better and cheaper, and that it is a sales argument with German mid-sized shops that do not want their data to leave the country.

## How it was built

These details come from the founders' podcast interview and the company's own pages. They are grade C.

- A crawler indexes the shop's catalog; a Shopify app, Shopware installation or product feed are the other ways in.
- An open-source model fine-tuned on e-commerce language runs on the company's own GPU server. The first versions used OpenAI.
- The vector database, which stores the number lists that represent each product, is Qdrant from Berlin.
- Everything is self-hosted on Kubernetes in Germany; the home page names an ISO 27001 data center in Nuremberg.
- The widget takes the shop's colors and fonts automatically, with CSS variables and a headless mode for full control.
- Search analytics in the dashboard: top terms, searches without results, trends.

Sources: [1, 2]

## Who tried this before Mandelbaum.ai, and why did they fail?

Three companies in our database of failed startups promised to find the right result from what a person means, or to help shoppers find products. The values below are from that database and are not independently verified.

The failed startups come from our database of dead startups, retold here in our own words; Its entries are AI-assisted summaries of public sources, so they carry no evidence grade.

### Omnity (2015 to 2021; funding US$4.5M; cause: Competition)

- Promise: A semantic search platform that connects unstructured data across many sources.
- Why it died: Larger companies such as Google and IBM Watson offered similar search with broader integrations.
- Record: 

### Neeva (2019 to 2023; funding US$77M; cause: No Market Need)

- Promise: An ad-free search engine that users pay for.
- Why it died: Users would not pay to switch from free Google, and then ChatGPT changed how people search.
- Record: 

### Operator (2015 to 2020; funding US$30M; cause: Unit Economics)

- Promise: A shopping service that finds products for you through a mix of people and software.
- Why it died: The human-heavy model cost too much, and Amazon and Walmart were faster and cheaper.
- Record: 

## What changed

Omnity and Neeva sold search as the main product to a broad market and competed directly with Google. Operator used people to understand what a shopper wanted, which did not scale. Mandelbaum sells to the shop owner, not to the searcher, and only replaces the search box inside one shop's catalog.

Embedding models now understand meaning well enough that a small team can run one on a single GPU server. Shopify and Shopware apps make installation a one-click step, and an agency's client list gave the founders their first buyers.

## Can one person copy Mandelbaum.ai now?

**Verdict: Partly: the product yes, the start less so.**

A solo founder can build semantic search with an open-source embedding model and a vector database today. The part that is harder to copy is the start: an agency that already had shop owners as clients and became an investor.

1. Pick one weak part of online shops that you see often in client work.
2. Build it for existing clients first, and let them test it.
3. Make installation one click on the large shop platforms.
4. Run the model yourself when data location is a sales argument.

**What is still open.** Shop search for other European languages and platforms, and search for catalogs outside retail, such as spare parts or B2B wholesale.

## What could go wrong for Mandelbaum.ai?

- **What is not verified.** No revenue figure was found. I looked for a payment-processor profile (TrustMRR lists no Mandelbaum), a founder statement of revenue or customer numbers, and a filed annual account. Everything about customers, funding and technology is the founders' account in a podcast published on 4 May 2026. A reader could look for the annual accounts of Mandelbaum GmbH (Amtsgericht Köln, HRB 127713) in the German company register, or a later interview with customer counts.
- **Trust signals on the home page.** The home page shows "CTR +38 %" and "Zero Results −82 %" and a row of shop logos under "Diese Shops vertrauen auf Mandelbaum" (these shops trust Mandelbaum), with no source or case study for the numbers. The /start page says "Für immer kostenlos" (free forever), the home page says "Ein Preis. Pro Monat.", and the podcast says billing is on conversions; the live page did not show the plan prices without its script.
- **Competition.** The founders say most search providers bill by API calls or search volume; large shop-search vendors and the shop platforms' own search are the competition. On this site no other story sells shop search; the closest is Dropmagic, an AI store builder for Shopify.
- **Dependence on model providers.** Low by the founders' account: they started on OpenAI and replaced it with their own fine-tuned open-source model on their own GPU server, with Qdrant as the vector database (podcast, May 2026; home page: "Kein OpenAI-Proxy"). The cost is that they carry the GPU hardware and the model work themselves. The product also depends on the Shopify and Shopware app platforms for one-click installation.

## Sources

1. Happy Bootstrapping #170, Andreas Lehr, 4 May 2026: Mandelbaum.ai: Semantische Suche für Online-Shops aus einer Agentur ausgegründet — https://happy-bootstrapping.de/podcast/mandelbaum-ai-semantische-suche-fur-online-shops-aus-einer-agentur-ausgegrundet-170/ (grade C). Read the episode page in full (German show notes; the audio was not played). Source for the spin-out, ownership, customers, channels, pricing model and technology.
2. Mandelbaum.ai home page, read 6 November 2026 — https://mandelbaum.ai/ (grade C). Read in full (German). Source for the product, integrations, hosting, the Enterprise plan and the home page claims.
3. Mandelbaum.ai Impressum, read 6 November 2026 — https://mandelbaum.ai/imprint/ (grade C). Read in full. Source for the company name, address, register number and managing directors.
4. Internet Archive copy of mandelbaum.ai, 29 March 2024 — https://web.archive.org/web/20240329145354/https://mandelbaum.ai/ (grade C). Read in full. Earliest archived copy; source for the first public site and its plans.
5. Internet Archive copy of mandelbaum.ai, 9 November 2025 — https://web.archive.org/web/20251109182108/https://mandelbaum.ai/ (grade C). Read in full. Source for the four plans and their euro prices.
6. Mandelbaum.ai start page, read 6 November 2026 — https://mandelbaum.ai/start/ (grade C). Read in full. Source for the "Für immer kostenlos" wording.
7. Federal Reserve Board, Foreign Exchange Rates H.10, release of 2 November 2026 — https://www.federalreserve.gov/releases/h10/current/ (grade A). Read the euro row. US$1.1163 per euro on 30 October 2026, used to convert the prices.
8. Database of failed startups, local export — /method/#dead (grade C). Local export. AI-written summaries, not independently verified. Source for the failed predecessors.

Contact: aiolum@livyden.com. Run Mandelbaum.ai? Send corrections or a verified figure to aiolum@livyden.com (subject: Correction: Mandelbaum.ai).