shouldiuse.io

New check

Comparison

Kopia vs Duplicati

Kopia lands on Worth it, and Duplicati lands on Depends.

Kopia

kopia.io

Worth it
Confidence: Medium

Free, fast, encrypted open-source backup that technical users and self-hosters love.

Read the full report

Add this comparison to your site

Kopia earned a Worth it check in this comparison with Duplicati.

Put the badge on your site.

Visitors see the independent comparison.

The link points here, and search engines follow it.

This is the badge visitors see on your site.

Worth it Kopia Depends Duplicati Independent comparison on Should I Use It

Paste one snippet. Keep the link as it is. A nofollow tag stops search engines from following it.

Kopia versus Duplicati
CompareKopiaDuplicati
VerdictWorth itDepends
Best forSelf-hosters and NAS ownersSelf-hosters and homelab users
Who it's not forNon-technical users wanting set-and-forget backups . use Backblaze or Time MachineNon-technical users wanting set-and-forget backup
PrivacyEncrypted by default; one critical server RCE (CVE-2026-45695) fixed in 0.23.0 . run the latest version.⁷Encryption design is solid (AES-256, zero-trust), but 2026 advisories mean you must run the latest patched version.16
Support qualityCommunity forums only; no paid supportCommunity forum only; no vendor support on free tier
Public sentimentOverwhelmingly positive among self-hosters and technical users who praise its speed, with a minority reporting defaults and performance issues.³Reviews are split: many call it powerful and unfairly criticized, while others report reliability problems severe enough to switch away.14
Biggest gotchaPatch to 0.23.0+ before running Kopia server; unauthenticated RCE (CVE-2026-45695)v2.3.0.1 has a published CERT alert (VU#847406) . run only the latest release16

Pick Kopia when

  • Self-hosters and NAS owners
  • Multi-OS households and small offices
  • Developers backing up to S3/B2
  • Privacy-focused users wanting encrypted dedup

When Kopia is not a fit

  • Non-technical users wanting set-and-forget backups . use Backblaze or Time Machine
  • Businesses needing vendor SLAs and support contracts
  • Anyone who won't promptly patch an internet-exposed Kopia server
  • Guess: enterprises needing certified compliance and managed backup

Pick Duplicati when

  • Self-hosters and homelab users
  • Technical users backing up to B2/S3
  • Budget-conscious encrypted backups
  • MSPs wanting a free backup agent

When Duplicati is not a fit

  • Non-technical users wanting set-and-forget backup
  • Businesses needing vendor SLAs or support contracts
  • Anyone unwilling to patch quickly after CVEs
  • Compliance-driven teams needing audited tooling

Sources

  1. Kopia official sitekopia.io
    official
  2. Kopia GitHub repositorygithub.com
    official
  3. Kopia is brilliant : r/selfhostedreddit.com
    review
  4. Kopia is by far the fastest backup tool . LowEndTalklowendtalk.com
    review
  5. MakeUseOf: open-source backup reviewmakeuseof.com
    review
  6. Kopia Backup RCE Vulnerability . Orca Securityorca.security
    security
  7. CVE-2026-45695 . NVDnvd.nist.gov
    security
  8. Dangerous default settings cause backup failures . GitHub issuegithub.com
    review
  9. Duplicati vs Duplicacy vs Kopia vs Vorta comparisonforum.duplicati.com
    review
  10. macOS backups with Kopia and Backblazehmarr.com
    review
  11. Duplicati Review 2026 . Cloudwardscloudwards.net
    review
  12. Duplicati Backup Review . BestBackupReviewsbestbackupreviews.com
    review
  13. Duplicati review: Our new favourite backup tool . ITProitpro.com
    review
  14. Is duplicati still bad? . Reddit r/selfhostedreddit.com
    review
  15. duplicati has crossed me for the last time . Reddit r/selfhostedreddit.com
    review
  16. VU#847406 . CERT/CC advisorykb.cert.org
    security