The article reviews the use of *Bacillus* species as biocontrol agents against tomato diseases caused by various pathogens. It discusses the antagonistic mechanisms and biocontrol potential of *Bacillus* spp., including the production of antimicrobial compounds, competition for nutrients and space, induced systemic resistance (ISR), and the stimulation of plant growth. The review highlights the effectiveness of *Bacillus* spp. in controlling tomato diseases such as early blight, septoria leaf spot, grey mould, Fusarium wilt, Verticillium wilt, late blight, bacterial speck, and bacterial wilt. The article also explores combined strategies involving *Bacillus* spp. and other methods, such as chemical fertilizers, organic fertilizers, and other biocontrol agents, to enhance disease control and improve tomato production. The authors emphasize the importance of integrated disease management (IDM) and the need for further research to improve the efficacy of *Bacillus* spp. in sustainable agricultural practices.The article reviews the use of *Bacillus* species as biocontrol agents against tomato diseases caused by various pathogens. It discusses the antagonistic mechanisms and biocontrol potential of *Bacillus* spp., including the production of antimicrobial compounds, competition for nutrients and space, induced systemic resistance (ISR), and the stimulation of plant growth. The review highlights the effectiveness of *Bacillus* spp. in controlling tomato diseases such as early blight, septoria leaf spot, grey mould, Fusarium wilt, Verticillium wilt, late blight, bacterial speck, and bacterial wilt. The article also explores combined strategies involving *Bacillus* spp. and other methods, such as chemical fertilizers, organic fertilizers, and other biocontrol agents, to enhance disease control and improve tomato production. The authors emphasize the importance of integrated disease management (IDM) and the need for further research to improve the efficacy of *Bacillus* spp. in sustainable agricultural practices.