SDC-based form authoring in 2026 has consolidated the medical form builder vendor space around a few production-ready platforms. The consolidation reflects real technical differentiation.
Category 1: Full-stack FHIR SDC platforms
Aidbox Formbox and Smile CDR SDC module provide authoring + rendering + extraction + integration with the FHIR backend as one system. Best for teams that want vertical integration.
Category 2: Open-source reference implementations
LHC-Forms and the NLM Form Builder are the NLM's reference implementations. Full SDC IG conformance, widely used in research protocols. Best for open-first teams.
Category 3: Enterprise EHR-integrated form builders
Epic MyChart forms, Cerner PowerChart forms — proprietary but tightly integrated with the vendor's EHR. Best when locked into the vendor already.
Category 4: Non-FHIR form builders (legacy)
Formstack, JotForm, custom HTML forms — still widely used for administrative forms. Don't produce FHIR resources; not suitable for clinical data capture.
Feature matrix (mid-2026)
| Vendor | SDC authoring | Rendering | $extract |
SMART launch | WCAG 2.1 |
|---|---|---|---|---|---|
| Aidbox Formbox | Full | Full | Full | Yes | Yes |
| Smile CDR SDC | Full | Full | Both | Yes | Yes |
| LHC-Forms | External | Full | Full | Yes | Yes |
| NLM Form Builder | Full | External | N/A | N/A | Yes |
| Epic MyChart | Proprietary | Proprietary | N/A | Epic-only | Yes |
Selection criteria
1. Do you need vertical integration or best-of-breed? Category 1 vs 2. 2. Are you locked into a specific EHR? Category 3. 3. Do you have compliance/regulatory constraints? Prefer conformance-tested implementations. 4. What's your team's tech stack? TypeScript-heavy → Medplum-adjacent tooling; Java-heavy → Smile CDR / HAPI-adjacent.
Medical form building in 2026 is a solved discipline for teams that pick the right vendor category. The mistake is picking a legacy non-FHIR builder for clinical data capture.
