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Head-to-head · Digital Signature API Software

BoldSign vs emSigner API

  • Updated Sep 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score BoldSign #2 in Digital Signature API Software 8.4/10 Free plan · paid from $5/user/mo (annual) · 30-day trial Free plan✓ 0 of 5 features Visit BoldSign
emSigner API #8 in Digital Signature API Software 6.9/10 From $0.99 · 30-day trial ✓ 5 of 5 features Visit emSigner API

BoldSign leads on 1 check, emSigner API on 5, and 0 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreBoldSign · 8.4/10
  • Free planonly BoldSign
  • Most featuresemSigner API · 5 of 5

BoldSign scores higher on our rubric for digital signature api software: 8.4 against 6.9 out of 10; our editors rank them #2 and #8.

BoldSign offers free plan; emSigner API doesn't. emSigner API offers embedded signing; BoldSign doesn't publish it. emSigner API offers identity verification; BoldSign doesn't publish it. emSigner API offers workflow status api; BoldSign doesn't publish it. emSigner API offers signed-file retrieval; BoldSign doesn't publish it.

BoldSign is the better fit for API buyers prioritizing low cost and breadth. emSigner API is the better fit for high-volume API signing at low envelope cost.

  • BoldSign fits best

    API buyers prioritizing low cost and breadth

  • emSigner API fits best

    High-volume API signing at low envelope cost

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature BoldSign 8.4/10 Visit ↗ emSigner API 6.9/10 Visit ↗
At a glance
Editor score 8.4 6.9
Ranking #2 in Digital Signature API Software #8 in Digital Signature API Software
Best for API buyers prioritizing low cost and breadth High-volume API signing at low envelope cost
Pricing model Free plan + paid Paid
Starting price Not published Not published
Free plan ✓ (best) —
Free trial — —
Free trial length 30 days · no card needed 30 days
Deployment Cloud, Mobile Cloud, Self-hosted
Platforms Web, iOS, Android Web, iOS, Android
Support Email, Live chat, Phone, Docs Email, Docs · 24/7
Compliance SOC 2, GDPR, HIPAA, SSO/SAML, 2FA SOC 2, ISO 27001, GDPR, HIPAA
Integrations 10 integrations 4 integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features BoldSign 0/5 · emSigner API 5/5
Embedded signing Not published ✓ (best)
Identity verification Not published ✓ (best)
Workflow status API Not published ✓ (best)
Signed-file retrieval Not published ✓ (best)
Sandbox environment Not published ✓ (best)
Specs
SDK languages Not published Not published
Webhook event types Not published 4
Our review
Pros
  • Free plan with 25 envelopes and audit trails
  • Embedded signing, requesting, templates, APIs, and SDK integrations
  • AI tools plus Salesforce, HubSpot, Zapier, and cloud storage integrations
  • $0.99 per-envelope pricing with annual billing
  • Embedded signing, webhooks, sandbox testing, and signed-document retrieval
  • Supports simple, advanced, and qualified electronic signatures
Cons
  • Essential limits usage to 25 envelopes and two templates monthly
  • Bulk sending is an add-on on the Premium plan
  • Enterprise API includes 40 API envelopes per month
  • The published plan is billed annually per envelope
  • Integration and feature breadth is narrower than some alternatives
  • The 30-day trial is advertised for the broader emSigner product
Our verdict

BoldSign is an electronic-signature platform for individuals, small businesses, teams, and enterprises. It supports document-signing workflows, reusable templates, audit trails, signer authentication, configurable signing order, and…

Read the review →

emSigner API is a REST-based electronic-signature and document-workflow service from eMudhra Limited. It is designed for organizations that want to place signing inside applications or connect document workflows to CRM, ERP, and other…

Read the review →
  1. BoldSignDigital Signature API Software 8.4Free plan · paid from $5/user/mo (annual) · 30-day trial
  2. emSigner APIDigital Signature API Software 6.9From $0.99 · 30-day trial

Strengths and trade-offs

  • BoldSign — where it wins

    • Free plan with 25 envelopes and audit trails
    • Embedded signing, requesting, templates, APIs, and SDK integrations
    • AI tools plus Salesforce, HubSpot, Zapier, and cloud storage integrations

    Where it doesn't

    • Essential limits usage to 25 envelopes and two templates monthly
    • Bulk sending is an add-on on the Premium plan
    • Enterprise API includes 40 API envelopes per month

  • emSigner API — where it wins

    • $0.99 per-envelope pricing with annual billing
    • Embedded signing, webhooks, sandbox testing, and signed-document retrieval
    • Supports simple, advanced, and qualified electronic signatures

    Where it doesn't

    • The published plan is billed annually per envelope
    • Integration and feature breadth is narrower than some alternatives
    • The 30-day trial is advertised for the broader emSigner product
  • BoldSign8.4/10 · Free plan · paid from $5/user/mo (annual) · 30-day trial

    A low-cost signing platform with broad workflow, integration, and API coverage.

    Visit BoldSignFull verdict →
  • emSigner API6.9/10 · From $0.99 · 30-day trial

    Low-cost API signing with embedded workflows, webhooks, and qualified signatures.

    Visit emSigner APIFull verdict →

More comparisons

All digital signature API software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update