Een egoïstische postbode en een eenzame speelgoedmaker sluiten een onvoorstelbare vriendschap. Ze brengen blijdschap in een koude, donkere stad die het hard nodig heeft.
Nee, helaas is Klaus nog niet beschikbaar op Netflix in Nederland.
| Sound | Alfonso G. Aguilar | Original Music Composer |
| Writing | Sergio Pablos | Original Story |
| Writing | Sergio Pablos | Screenplay |
| Writing | Zach Lewis | Screenplay |
| Writing | Edgar Martins | Head of Story |
| Writing | Jim Mahoney | Screenplay |
| Visual Effects | Daniel Fernandez-Casas | Character Designer |
| Directing | Sergio Pablos | Director |
| Art | Szymon Biernacki | Production Design |
| Production | Eamonn Butler | Executive Producer |
| Visual Effects | Victor Ens | Lead Animator |
| Production | Mercedes Gamero | Producer |
| Production | Matthew Jon Beck | Casting |
| Visual Effects | Borja Montoro | Animation |
| Production | Mikel Lejarza | Producer |
| Visual Effects | Alex Orrelle | Animation |
| Visual Effects | Matt Williames | Lead Animator |
| Production | Marisa Román | Producer |
| Visual Effects | Maxime Delalande | Animation |
| Production | Jinko Gotoh | Executive Producer |
| Visual Effects | Torsten Schrank | Character Designer |
| Production | Warren Franklin | Executive Producer |
| Production | Micah Dahlberg | Producer |
| Production | Sergio Pablos | Producer |
| Visual Effects | Olivier Clert | Animation |
| Production | Tanguy Olivier | Producer |
| Production | Gustavo Ferrada | Producer |
| Sound | Carlos Sotolongo | Dialogue Editor |
| Visual Effects | Jorge A. Capote | Animation |
| Visual Effects | Tom Sales | Animation |
| Directing | Carlos Martínez López | Co-Director |
| Editing | Pablo García Revert | Editor |
| Art | Marcin Jakubowski | Production Design |
| Production | Micah Dahlberg | Casting |
| Crew | Alan Tyler | Additional Music |
| Visual Effects | Charles Bonifacio | Lead Animator |
| Art | Taha Neyestani | Storyboard Artist |
| Visual Effects | Sergio Martins | Lead Animator |
| Visual Effects | Slaven Reese | Lead Animator |
| Visual Effects | Alfredo Cassano | Lead Animator |
| Visual Effects | Jochem Van Gool | Lead Animator |
| Visual Effects | James Baxter | Animation |
| Visual Effects | Samuel Cabanac | Animation |
| Visual Effects | Simone Cirillo | Animation |
| Visual Effects | Daniel Thomas Crook | Animation |
| Visual Effects | Clément Girard | Animation |
| Visual Effects | Rapeepat Jewanarom | Animation |
| Visual Effects | Carlos Luzzi | Animation |
| Visual Effects | Sergio Mateo Merino | Animation |
| Visual Effects | Tracy Nowocien | Animation |
| Visual Effects | Toby Schwarz | Animation |
| Visual Effects | Marc Valls Pla | Animation |
| Visual Effects | Giovanni Braggio | Animation |
| Visual Effects | Cécile Carre | Animation |
| Visual Effects | Sandro Cleuzo | Animation |
| Visual Effects | Eve Guastella | Animation |
| Visual Effects | Ole Christian Løken | Animation |
| Visual Effects | Jorge Duran Llanos | Animation |
| Visual Effects | Joseph Meredith | Animation |
| Visual Effects | Daniel O'Sullivan | Animation |
| Visual Effects | Len Simon | Animation |
| Visual Effects | David Vandervoort | Animation |
| Visual Effects | Alvise Zennaro | Animation |
| Visual Effects | Jeremie Becquer | Animation |
| Visual Effects | Andrew Chesworth | Animation |
| Visual Effects | Laura Cobo | Animation |
| Visual Effects | Tony Fucile | Animation |
| Visual Effects | Mael Gourmelen | Animation |
| Visual Effects | Valentin Lucas | Animation |
| Visual Effects | Cristina De Manuel | Animation |
| Visual Effects | Fernando Moro | Animation |
| Visual Effects | Caroline Piochon | Animation |
| Visual Effects | Tugrul Tiryaki | Animation |
| Visual Effects | Alain Vu | Animation |
| Visual Effects | Desi Garrido | Animation |
| Visual Effects | José Mansuy | Animation |
| Visual Effects | Álvaro Morote | Animation |
| Visual Effects | Eduardo Quintana | Animation |
| Visual Effects | Maria Torregosa Domenech | Animation |
| Visual Effects | Pauline Champetier | Animation |
| Visual Effects | Arturo Hernández Correas | Animation |
| Visual Effects | Sergio Molinero Garçia | Animation |
| Visual Effects | Pablo Navarro | Animation |
| Visual Effects | Joshua Schneider | Animation |
| Visual Effects | Mathilde Vachet | Animation |
| Visual Effects | Javier Ferrer | Animation |
| Visual Effects | Carlos Linares-Rivas Rodríguez | Animation |
| Visual Effects | John Pomeroy | Animation |
| Visual Effects | Marcel Tigchelaar | Animation |
| Visual Effects | Paul Williams | Animation |
| Visual Effects | Yoshimichi Tamura | Lead Animator |
