What's unclear is what exactly swayed Ricciardo's decision to move there but what is for certain is that Renault had to see off competition to claim his services.
The Australian has been on Red Bull's books since 2008, winning titles in Formula Renault 2.0 and British Formula 3 before the energy drinks giant brought him into grand prix racing in 2011.
I think it will be healthy for me so excited for what lies ahead for me at Renault. Had we been running more competitively I think that would have increased our odds.
Former F1 driver and current Sky Sports pundit Martin Brundle has spoken out on Carlos Sainz Junior's current situation and has called it a "travesty" if the Spaniard doesn't end up with a competitive vehicle next year. "Ultimately Daniel would be best to tell you how close".
Ricciardo made his announcement Friday evening with Red Bull revealing the news on its Twitter account.
"I think he had a strong desire to leave", Brown suggested.
Despite the re-signing of their prized drivers Lewis Hamilton and Valtteri Bottas all but ruling out the possibility of Ricciardo joining their ranks, the Twittersphere came alight with speculation and hysteria.
A part-season with HRT paved way for his full-time F1 graduation with Toro Rosso in 2012, and he was then brought into Red Bull's main team to replace Mark Webber, winning seven races for the squad since '14.
With Ricciardo leaving Red Bull, there has been some suggestion it could make way for Fernando Alonso to take his place after recent uncertainty regarding his future at McLaren.
Asked whether Sainz position is a major factor in McLaren's plans for next season, Brown answered: "No, not necessarily". "But we've got a plan which we are executing against which Ricciardo's move doesn't impact". Things I will always be grateful for and I will never forget that ride.
"I felt it was good for me to move on and a fresh start somewhere else".