Antios Therapeutics vs Spero Therapeutics
Antios Therapeutics
Antios Therapeutics is a clinical-stage biopharmaceutical company devoted to developing therapies for viral diseases
1 employees · est. 2018 · Atlanta, United States
Spero Therapeutics
Clinical-stage biotech company focused on rare diseases and diseases with high unmet need
44 employees · est. 2013 · Cambridge, United States
Spero Therapeutics is the older company (2018 vs 2013); Spero Therapeutics is the larger of the two.
Side-by-Side Comparison
| Metric | Antios Therapeutics | Spero Therapeutics |
|---|---|---|
| Founded | ||
| Founded | 2018 | 2013 older |
| Headquarters | ||
| Headquarters | Atlanta, United States | Cambridge, United States |
| Employees | ||
| Employees | 1 | 44 larger |
| Industry | ||
| Industry | Biopharma, Biotechnology, Health and Wellness | Biotechnology, Pharmaceutical |
| Funding Stage | ||
| Funding Stage | Not tracked yet | IPO |
| Total Funding | ||
| Total Funding | $200.40M | $374.60M |
| Funding Rounds | ||
| Funding Rounds | 6 | 12 |
| Services | ||
| Services | Development of ASPIN, ATI-2173, HBV Polymerase Activity Inhibition, Capsid Assembly Modulator Programs | Development of Oral Carbapenem Antibiotics, Drug Pipeline for Rare and MDR Infections, Clinical Trial Execution, Partnership Development |
| Target Customers | ||
| Target Customers | HBV Infected Individuals, Medical Researchers, Healthcare Providers | Patients with Complicated Urinary Tract Infections, Patients with Pyelonephritis, Healthcare Providers, Pharmaceutical Collaborators |
| Taxonomy | ||
| Taxonomy | Clinical-stageBiopharmaceuticalViral DiseasesInnovative TherapiesHBV InfectionsOral Drug Development +5 | BiopharmaceuticalClinical-stageBiotech CompanyBacterial InfectionsMulti-drug ResistantRare Diseases +9 |
| Website | ||
| Website | antiostherapeutics.com | sperotherapeutics.com |
About Antios Therapeutics
Antios Therapeutics is a clinical-stage biopharmaceutical company committed to the development of therapies targeting viral diseases. Founded in 2018 and headquartered in the United States, the company leverages a strong leadership team to advance its flagship oral drug candidate, ushering in a new...
About Spero Therapeutics
Spero Therapeutics, founded in 2013 and headquartered in the United States, is a multi-asset, clinical-stage biotech company specializing in treatments for multidrug-resistant bacterial infections and rare diseases. With a strong focus on addressing antibiotic resistance, the company is carving out...
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Compiled from the BounceWatch company index. We last looked at Antios Therapeutics on 11 Mar 2026, and Spero Therapeutics on 9 Jun 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
