The paper investigates anticancer effects of methanol extracts of invasive plant species Robinia pseudoacacia L. (RpE) and Amorpha fruticosa L. (AfE) on breast cancer MDA-MB-231 and healthy MRC-5 cells. The anticancer activity was evaluated through examination of cytotoxic effects, anti-invasive potential and impact on redox status in comparative analysis using their chemical composition. According to the IC 50 values, the investigated plants had no significant cytotoxic effects either on healthy cell line MRC-5 or on MDA-MB-231 cancer cells, but they showed great anti-invasive potential by suppressing all investigated parameters of tumor invasion and metastases (Matrix Metalloproteinases (MMP), protein concentration and MMP-9, C-X-C Motif Chemokine Ligand 12 (CXCL-12), Vascular Endothelial Growth Factor (VEGF-A) and Hypoxia-Inducible Factor (HIF-1α) gene expression) in MDA-MB-231 cells. Based on their remarkable anti-invasive potential, RpE and AfE are suitable for use as potential supplements in anticancer therapy or as nutritional food supplements.