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Bacterial wilt of eggplant is the most destructive disease caused by <i>Ralstonia solanacearum</i> throughout the world. Eleven bacterial strains with high antagonistic activity were obtained from 245 rhizobacteria. Based on analysis of morphology, 16S rRNA sequences, fatty acid profiles, <i>gyrA</i> and <i>rpoB</i> genes, they were identified as <i>Pseudomonas putida</i> (IMA3), <i>Paenibacillus polymyxa</i> (IMA5), <i>Bacillus cereus</i> (IMA4, IMA7 and IMA11) and the &#8220;operational group <i>Bacillus amyloliquefaciens</i>&#8221; (IMA1, IMA2, IMA6, IMA8, IMA9 and IMA10). The lipopeptide compounds produced by each strain also were determined. The biocontrol tests demonstrated that co-inoculation by strain IMA5 and the pathogen gave the greatest biocontrol efficiency of 87.0% and 69.2% 30 and 40 days after co-inoculation, respectively. Plant growth promotion tests revealed that IMA5 markedly promoted eggplant growth, enhancing aboveground seedling length and biomass by 60.8% and by 107.6% and underground root length and biomass by 33.0% and 69.2%, respectively. Hence, strain IMA5 could be considered for developing potential biocontrol agents and for promoting plant growth characteristics, to aid the management of the pathogen <i>R. solanacearum</i> in eggplants.