Who invested in CastBox

3 rounds we have observed, with the 6 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

EntertainmentInternet

Funding summaryUpdated 26 Oct 2026

$45Mraised across 3 rounds since 2017, from 3 sources

$16MRound$14MSeries B$15MSeries C

Latest round: Series C, $15MApr 2021
Biggest round: $16MRound · Oct 2017
Investors: 6 (1 led)

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2018201920202021

$16MRound$14MSeries B$15MSeries C

First round: Round, $16M
Biggest round: $16M
Usual gap between rounds: 2.9 years

The rounds

Apr 2021
Series C$15M1 new3 returning
Source recorded
Apr 2018
Series B$14M1 new2 returning
- SIG China/ IDGLead
- Qiming Venture Partners
- GSR
Reported by TechCrunch
Oct 2017
Round$16M4 new
- Qiming Venture Partners
- GSR
- ZhenFund
- IDG Capital/ SIG China
Reported by FinSMEs

Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

Round2017Series B2018Series C2021

Qiming Venture Partners

GSR

ZhenFundSIG China/ IDGL

IDG CapitalIDG Capital/ SIG China

Everyone who backed them

Qiming Venture PartnersVC firm3rounds

GSRVC firm3rounds

ZhenFundVC firm2rounds

SIG China/ IDGno record of our own yet1round, led 1

IDG CapitalPrivate equity1round

IDG Capital/ SIG Chinano record of our own yet1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

This firm lists CastBox as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.