Elastic (ELK Stack) vs Splunk
Elastic (Elasticsearch + Kibana + Logstash) and Splunk are the two primary platforms for log aggregation, search, and security analytics at enterprise scale. Elastic is open-source and significantly cheaper to self-host. Splunk is the commercial platform with a larger security content library and stronger SIEM out-of-the-box. Many organizations choose Elastic for cost; enterprises with heavy security requirements often stay on Splunk.
Build a custom alternative freeSide-by-side
Open-source search, observability, and security vs Enterprise log management and security intelligence.
| Feature | Elastic (ELK Stack) | Splunk |
|---|---|---|
| Pricing from | Free OSS / Cloud from $95/month | Custom enterprise |
| Open source | Yes (Elasticsearch, Kibana, Logstash) | No |
| Cost at 100 GB/day | Near-zero self-hosted | Potentially $100k+/year |
| SIEM out-of-box | Good (Elastic Security) | Best-in-class |
| Machine learning | Yes (ML Jobs in Elastic) | Yes (Splunk MLTK) |
| Setup complexity | High - significant engineering effort | Moderate - easier setup but complex configuration |
| Best for | Engineering teams with ops expertise | Security-focused enterprises |
The third option most teams miss
Picking between Elastic (ELK Stack) and Splunk isn't the only choice.
For security and ops teams that need custom dashboards and alert management tools on top of their log data, Appaca builds the internal ops view.
- No code, no deployment, no devops
- Built-in database, dashboards, team access
- Refine with chat as your needs change
- Free to start, no per-seat pricing surprises
Common questions
Yes, significantly. Elastic's open-source stack can be self-hosted at near-zero license cost. Even Elastic Cloud is typically cheaper than comparable Splunk deployments. The tradeoff is more engineering effort to operate.
Appaca is a third option for teams that don't want to choose between two existing tools. Instead of forcing your workflow into someone else's product, Appaca builds a custom app from a description - with built-in database, hosting, and team access. Try it free at appaca.ai.