NBCUniversal's Peacock is the latest streaming service that isn't available on Roku and Amazon Fire TV

• NBCUniversal's new streaming service, Peacock, launched on Wednesday, but not on Roku or Amazon platforms.
• Roku and Amazon account for 70% of the combined market share as of July 2019, according to the market research firm Parks Associates.
• WarnerMedia's HBO Max still doesn't have a deal with Amazon and Roku more than a month after it launched.

NBCUniversal's new streaming service, Peacock, debuted on Wednesday, but not on the largest streaming distribution platforms, Roku and Amazon.

NBCU failed to reach a distribution deal with Roku and Amazon ahead of the Wednesday launch. The two platforms account for 70% of the combined market share as of July 2019, according to the market research firm Parks Associates.

A Peacock spokesperson told Business Insider: "We are in talks with additional partners and the Peacock app is ready to launch across platforms with the flip of a switch. We think it's important for consumers to know that Peacock is free to use and free to any platform who wants to distribute it."

"If Peacock is not available on a platform at launch, it is not because we didn't make it available, and it's not because we didn't make it available for free," the spokesperson said. "Consumers have purchased these devices with the expectation they will be able to access all of the apps, so our hope is that all platforms will do right by their users and carry it."

Peacock enters a crowded streaming field that also includes WarnerMedia's HBO Max, which launched in May also without Roku and Amazon support. No deal has been reached more than a month later.

WarnerMedia and NBCU want people to access Max and Peacock directly through the app rather than through the Roku Channel and Amazon Channels, so that the companies can gather user data. Nearly a third of US customers in the past year subscribed to streaming platforms through aggregation services like Amazon Channels and the Roku Channel, according to Parks Associates.

Roku typically takes 20% of subscription fees and Amazon between 15% and 45% from those who subscribe through their channel features, according to Variety. But in negotiations with WarnerMedia and NBCU, the platforms are also asking for ad inventory, free content for the Roku Channel and Amazon's IMDb TV, and more, Variety reported.

Some people went on Twitter on Wednesday to complain about Peacock's lack of Roku and Amazon support.

"It's too bad that #Peacock is not offered on Roku or Fire Stick!," one user tweeted. "Oh well ... guess I won't be watching until it's offered."

Peacock responded to some disgruntled potential subscribers by telling them to take it up with Roku and Amazon.

"Peacock is free to you and free to all platforms, so why should anyone have to miss out?," Peacock tweeted in response to a Twitter user. "Squawk to Roku and in the meantime check out all the other platforms where we are free."

Peacock launched a trial version in April for some Comcast customers (Comcast is NBCU's parent company).

It launched on Wednesday with an ad-supported free version that offers limited content and a two tiers of premium (ad-supported and ad-free). Peacock Premium offers more content, including Peacock originals, at different price points. The ad-supported Premium is $4.99 per month or $49.99 per year, and an ad-free version is $9.99 per month or $99.99 per year.