Belong competitors and alternatives
As of Nov 15, 2026, Alion lists 10 companies most like Belong: BuySell Technologies, OurValue, Mercari, Plug, Back Market, Vintage, Huntstreet, Danggeun Market, Katix and Speedioo.
- Belong itself has 20 open roles on Alion.
- Of them, Mercari is hiring the most, with 126 open roles.
- Open roles at Danggeun Market fell the most: from 43 on Oct 12, 2026 to 37 now.
Belong and its competitors compared
Open roles are the postings Alion lists today; their change is shown only for career sites that state posting dates. Funding is the venture money on record. A dash means Alion holds no figure.
| Company | Open roles | Change | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|
Belong
This company
|
20 | – | 51-200 | Tokyo, Japan | Google BigQuery, GCP, JavaScript | Japan |
BuySell Technologies
In common: Secondhand · Python, JavaScript, TypeScript · headquarters in Japan |
12 | – | – | Tokyo, Japan | Google BigQuery, AWS, Terraform | Japan |
OurValue
In common: Secondhand · Python, JavaScript, TypeScript · headquarters in Japan |
18 | – | – | Tokyo, Japan | AWS, AWS Lambda, TypeScript | Japan |
Mercari
In common: Secondhand · Python, JavaScript, TypeScript · headquarters in Japan |
126 | +13%since Oct 12, 2026 | 1001-5000 | Tokyo, Japan | GitHub, GCP, Google BigQuery | Japan, India |
Plug
In common: Secondhand · Python, JavaScript, TypeScript |
17 | – | 51-200 | Los Angeles, United States | AI Agents, TypeScript, CI/CD | United States |
| Back Market In common: Secondhand · Python, JavaScript, TypeScript | 30 | -6%since Oct 12, 2026 | 51-200 | Paris, France | SQL, Google BigQuery, Python | France, Spain, Japan +2 more |
Vintage
In common: Secondhand · JavaScript, TypeScript, React.js |
18 | – | 51-200 | Leeds, United Kingdom | Microsoft Excel, GitHub Actions, SOAP | Austria, United Kingdom, Netherlands +1 more |
Huntstreet
In common: Secondhand · Python, JavaScript, TypeScript |
3 | – | 51-200 | Jakarta, Indonesia | ChatGPT, PHP, Windows | Philippines |
Danggeun Market
In common: Secondhand · Python, JavaScript, TypeScript |
37 | -14%since Oct 12, 2026 | 201-500 | Seoul, South Korea | Google BigQuery, LLM, Kotlin | South Korea |
Katix
In common: Secondhand · Python, JavaScript, TypeScript · headquarters in Japan |
4 | – | 51-200 | Tokyo, Japan | TypeScript, Docker, React.js | Japan |
Speedioo
In common: Secondhand · Python, JavaScript, TypeScript |
1 | – | – | Bengaluru, India | Node JS, JavaScript, Python | India |
How the list is made
The list comes from Alion's similar-companies engine, the same one AI agents query through the Alion MCP server. A company ranks higher when it shares more of Belong's industry segments and is less spread over others, when its job postings name the same technologies, when it is headquartered in the same country and when its size is close. The list is rebuilt every week.
How to cite this page
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page.
Alion, "Belong competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 15, 2026. https://alion.io/company/belong-co-jp/competitors