Rigorous peer-reviews are the basis of high-quality academic publishing. Due to the great efforts of our reviewers, Informatics was able to sustain and enhance its standards leading to the continuing high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 20 days and the median time to publication was 41 days. The editors would like to extend their gratitude and recognition to the following reviewers for devoting their precious time and demonstrating their dedication, regardless of whether the papers they reviewed were finally published:
| Abdel Aleem, Shady H.E. | Ledbetter, Mark |
| Alshehri, Yasser Ali | Lee, Jui-Hsiang |
| Amo, Daniel | Lee, Ki-Sun |
| Antunes, Mário | Leo, Sabrina |
| Araújo, Allysson Allex | Leone, Marilisa |
| Arsevska, Elena | Levy, Sharon |
| As, Mansur | Lim, Sangsoon |
| Aujayeb, Avinash | Lin, Jia-Wen |
| Bakator, Mihalj | Lin, Ming-Chin |
| Balandin, Sergey | Linnes, Cathrine |
| Battineni, Gopi | Liu, Zhiying |
| Becattini, Federico | Liu, Zhiyong |
| Berlak, Joachim | Llopart-saumell, Elisabet |
| Billingsley, Luanne | Loukil, Faiza |
| Brito, Ronnie | Lupo, Giampiero |
| Buciakowski, Mariusz | Machado, Ivan |
| Calvillo-Arbizu, Jorge | Makarova, Irina |
| Calvo, Hiram | Markakis, Evangelos |
| Campajola, Carlo | Mata, Mário Nuno |
| Carbone, Marina | Mavridis, Nikolaos |
| Ceptureanu, Sebastian Ion | Meidute-Kavaliauskiene, Ieva |
| Chan, Polly Siu Ling | Melendi, David |
| Chang, IPin | Mesesan Schmitz, Luiza |
| Chatzigrigoriou, Pavlos | Mikalef, Patrick |
| Chen, Sonia Chien-I | Miszczak, Jaroslaw Adam |
| Cho, Hwan-Gue | Mocanu, Irina Georgiana |
| Cho, Na-Eun | Moen, Anne |
| Chui, Kwok Tai | Moliner Miravet, María Lidón |
| Chumachenko, Dmytro | Morreale, Fabio |
| Čišić, Dragan | Mrugalska, Beata |
| Costa, Felipe | Munawir, Munawir |
| Couchot, Jean François | Muñiz Rodríguez, Laura |
| Cromières, Fabien | Nakamura, Masanori |
| D’Acierno, Luca | Naldi, Maurizio |
| Daramola, Olawande | Naranjo-Torres, José |
| Dashtipour, Kia | Nedič, Drago N. |
| De Luca, Pasquale | Nie, Liqiang |
| De Simone, Salvatore Giovanni | Nikiforou, Maria Nefeli |
| Deka, Pallav | Nowak-Brzezińska, Agnieszka |
| Deufemia, Vincenzo | Oh, Sam Gyun |
| Diez Bosch, Miriam | Ohshima, Naoki |
| Ding, Kai | Okada, Taketo |
| Donaj, Gregor | Olejniczak, Anthony J. |
| Donevant, Sara B. | Oncins, Estella |
| Dragoni, Aldo Franco | Ortega, John |
| Dritsas, Elias | O’Shaughnessy, Douglas |
| Drucker, Johanna | Osório, António José |
| Dumnić, Marija | Palos-Sánchez, Pedro |
| Durairaj, Rajesh | Pamuković, Jelena Kilić |
| Elbattah, Mahmoud | Pankowska, Malgorzata |
| Falkowski-Gilski, Przemyslaw | Parada Medina, Raúl |
| Faro, Sebastiano | Parrish, Richard |
| Feng, Shuo | Paweł, Dymora |
| Ferrazani Mattos, Diogo Menezes | Philbin, Simon |
| Ferretti, Luca | Pin, Paolo |
| Filippakis, Michael | Pisco Almeida, Ana Margarida |
| Fornaro, Claudio | Podila, Pradeep |
| Foronda, Cynthia L. | Prati, Ronaldo |
| Freitas, Leandro Oliveira | Prelipceanu, Marius |
| Gabrielli, Alessandro | Puladi, Behrus |
| Gallardo, Jesús | Qi, Lin |
| Gerber, Nina | Quintero-Bonilla, Santiago |
| Giansanti, Daniele | Reid, Scott |
| Gibbons, Jeff | Resende, Natalia |
| Glowacz, Adam | Rezig, Sadok |
| Gnoni, Maria Grazia | Ricciardi, Carlo |
| Gogolák, László | Rifà-Pous, Helena |
| Goliatt, Leonardo | Righi, Rodrigo |
| Gómez-Galán, José | Rizun, Mariia |
| Gómez-Rodríguez, Alma | Rodriguez, Igor Rodriguez |
| Gonçalves, Eder Mateus Nunes | Ruiz-Nuñez, Carlos |
| Gonzalez-Perez, Cesar | Rupeika-Apoga, Ramona |
| Gordon, Barbara | S. Mir, Hasan |
| Grześk, Grzegorz | Sabina, Civila |
| Guarino, Alfonso | Salzer, Isabella |
| Guharay, Sabyasachi | Sanchez-Perez, Maria Del Mar |
| Hadley, James | Sang, Yingpeng |
| Hajiali, Mahdi | Sanna, Andrea |
| Hasan, Raza | Sarasa-Cabezuelo, Antonio |
| He, Yusen | Schreiber, Andreas |
| Hershman, Steve | Senhadji-Navarro, Raouf |
| Ho, Roger | Shamshiri, Redmond R. |
| Hogg, Rachel | Shen, Chih-Hsiung |
| Holubčík, Martin | Signorelli, Gabriel Ruiz |
| Honey, Michelle Lorraine Lewis | Sik-Lanyi, Cecilia |
| Huang, Xiaoyan | Silva, Carlos |
| Hubáčková, Šárka | Simões, Nádia |
| Hunt, Jodi | Sitaula, Chiranjibi |
| Iacob, Ionut Emil | Šolc, Marek |
| Ibrahim, Dhorgham Skban | Sosnowski, Janusz |
| Ikeda, Kazuki | Southwell, Brian |
| Ilba, Mateusz | St-Charles, Pierre-Luc |
| Isgrò, Francesco | Stec, Piotr |
| Islam, Kh Tohidul | Stefanovič, Pavel |
| Jafarijoo, Mina | Su, Chung-Ho |
| Jeong, Doowon | Suciu, George |
| Juarez-Sandoval, Oswaldo Ulises | Szabo, Lorand |
| Juárez-Vela, Raúl | Tabacu, Lucia |
| Jurman, Giuseppe | Taylor, Isaac |
| Kakanakov, Nikolay | Teixeira, Carlos S. C. |
| Kapareliotis, Ilias | Tijan, Edvard |
| Karargyris, Alexandros | Tripathy, Rajesh Kumar |
| Karetsos, Sotiris | Tseng, Judy C. R. |
| Karpiński, Mikołaj | Tzafilkou, Katerina |
| Kaushik, Abhishek | Uchroński, Mariusz |
| Kawala-Sterniuk, Aleksandra | Van Hove, Leo |
| Khan, Asif | Venditto, Bruno |
| Khanh Le, Nguyen Quoc | Ventura, Michele Della |
| Kikis-Papadakis, Kathy | Voss, Andreas |
| Kim, Joon | Wen, Kun-Li |
| Kim, Kamyoung | Wenskovitch, John |
| Kipyatkova, Irina S. | Werner, Piotr A. |
| Kitchen, Christina | Wu, Ching-Seh |
| Koole, Marguerite | Yazdani, Maziar |
| Korzun, Dmitry | Yu, Lei |
| Kot, Sebastian | Zabelin, Oleg |
| Koutsojannis, Constantinos | Zamora, Marco |
| Król, Karol | Zarayeneh, Neda |
| Kulawiak, Marcin | Zeni, Nicola |
| La Rosa, Massimo | Zhang, Jialin |
| Lalousis, Paris Alexandros | Zhou, Qiqi |
| László, Kovács | Zygouris, Nikolaos C. |
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