diff --git a/README.md b/README.md
index b9c12b8c..7e31ee9b 100644
--- a/README.md
+++ b/README.md
@@ -276,7 +276,8 @@ GRIST_FORCE_LOGIN    | Much like GRIST_ANON_PLAYGROUND but don't support anonymo
 GRIST_SINGLE_ORG | set to an org "domain" to pin client to that org
 GRIST_TEMPLATE_ORG | set to an org "domain" to show public docs from that org
 GRIST_HELP_CENTER | set the help center link ref
-FREE_COACHING_CALL_URL | set the link to the human help (example: email or meeting scheduling tool)
+FREE_COACHING_CALL_URL | set the link to the human help (example: email adress or meeting scheduling tool)
+GRIST_CONTACT_SUPPORT_URL | set the link to contact support on error pages (example: email adress or online form)
 GRIST_SUPPORT_ANON | if set to 'true', show UI for anonymous access (not shown by default)
 GRIST_SUPPORT_EMAIL | if set, give a user with the specified email support powers. The main extra power is the ability to share sites, workspaces, and docs with all users in a listed way.
 GRIST_TELEMETRY_LEVEL | the telemetry level. Can be set to: `off` (default), `limited`, or `full`.
diff --git a/app/client/ui/WelcomeCoachingCall.ts b/app/client/ui/WelcomeCoachingCall.ts
index 2aa91818..04fe34c3 100644
--- a/app/client/ui/WelcomeCoachingCall.ts
+++ b/app/client/ui/WelcomeCoachingCall.ts
@@ -8,6 +8,7 @@ import {cardPopup, cssPopupBody, cssPopupButtons, cssPopupCloseButton,
 import {icon} from 'app/client/ui2018/icons';
 import {getGristConfig} from 'app/common/urlUtils';
 import {dom, styled} from 'grainjs';
+import { commonUrls } from 'app/common/gristUrls';
 
 const t = makeT('WelcomeCoachingCall');
 
@@ -103,7 +104,7 @@ We can show you the Grist basics, or start working with your data right away to
             logTelemetryEvent('clickedScheduleCoachingCall');
           }),
           {
-            href: getGristConfig().freeCoachingCallUrl,
+            href: commonUrls.freeCoachingCall,
             target: '_blank',
           },
           testId('popup-primary-button'),
diff --git a/app/client/ui/errorPages.ts b/app/client/ui/errorPages.ts
index 569ad2ac..b21ac106 100644
--- a/app/client/ui/errorPages.ts
+++ b/app/client/ui/errorPages.ts
@@ -7,7 +7,7 @@ import {pagePanels} from 'app/client/ui/PagePanels';
 import {createTopBarHome} from 'app/client/ui/TopBar';
 import {bigBasicButtonLink, bigPrimaryButtonLink} from 'app/client/ui2018/buttons';
 import {theme, vars} from 'app/client/ui2018/cssVars';
-import {getPageTitleSuffix} from 'app/common/gristUrls';
+import {commonUrls, getPageTitleSuffix} from 'app/common/gristUrls';
 import {getGristConfig} from 'app/common/urlUtils';
 import {dom, DomElementArg, makeTestId, observable, styled} from 'grainjs';
 
@@ -94,7 +94,7 @@ export function createNotFoundPage(appModel: AppModel, message?: string) {
     })),
     cssButtonWrap(bigPrimaryButtonLink(t("Go to main page"), testId('error-primary-btn'),
       urlState().setLinkUrl({}))),
-    cssButtonWrap(bigBasicButtonLink(t("Contact support"), {href: 'https://getgrist.com/contact'})),
+    cssButtonWrap(bigBasicButtonLink(t("Contact support"), {href: commonUrls.contactSupport})),
   ]);
 }
 
@@ -109,7 +109,7 @@ export function createOtherErrorPage(appModel: AppModel, message?: string) {
       t('There was an unknown error.')),
     cssButtonWrap(bigPrimaryButtonLink(t("Go to main page"), testId('error-primary-btn'),
       urlState().setLinkUrl({}))),
-    cssButtonWrap(bigBasicButtonLink(t("Contact support"), {href: 'https://getgrist.com/contact'})),
+    cssButtonWrap(bigBasicButtonLink(t("Contact support"), {href: commonUrls.contactSupport})),
   ]);
 }
 
diff --git a/app/common/gristUrls.ts b/app/common/gristUrls.ts
index b9b2d308..c56440d3 100644
--- a/app/common/gristUrls.ts
+++ b/app/common/gristUrls.ts
@@ -86,6 +86,8 @@ export const commonUrls = {
   helpTelemetryLimited: "https://support.getgrist.com/telemetry-limited",
   helpCalendarWidget: "https://support.getgrist.com/widget-calendar",
   helpLinkKeys: "https://support.getgrist.com/examples/2021-04-link-keys",
+  freeCoachingCall: getFreeCoachingCallUrl(),
+  contactSupport: getContactSupportUrl(),
   plans: "https://www.getgrist.com/pricing",
   sproutsProgram: "https://www.getgrist.com/sprouts-program",
   contact: "https://www.getgrist.com/contact",
@@ -670,6 +672,9 @@ export interface GristLoadConfig {
   // Url for free coaching call scheduling for the browser client to use.
   freeCoachingCallUrl?: string;
 
+  // Url for "contact support" button on Grist's "not found" error page
+  contactSupportUrl?: string;
+
   // When set, this directs the client to encode org information in path, not in domain.
   pathOnly?: boolean;
 
@@ -865,21 +870,33 @@ export function getKnownOrg(): string|null {
   }
 }
 
-export function getHelpCenterUrl(): string|null {
+export function getHelpCenterUrl(): string {
+  const defaultUrl = "https://support.getgrist.com";
+  if(isClient()) {
+    const gristConfig: GristLoadConfig = (window as any).gristConfig;
+    return gristConfig && gristConfig.helpCenterUrl || defaultUrl;
+  } else {
+    return process.env.GRIST_HELP_CENTER || defaultUrl;
+  }
+}
+
+export function getFreeCoachingCallUrl(): string {
+  const defaultUrl = "https://calendly.com/grist-team/grist-free-coaching-call";
   if(isClient()) {
     const gristConfig: GristLoadConfig = (window as any).gristConfig;
-    return gristConfig && gristConfig.helpCenterUrl || null;
+    return gristConfig && gristConfig.freeCoachingCallUrl || defaultUrl;
   } else {
-    return process.env.GRIST_HELP_CENTER || null;
+    return process.env.FREE_COACHING_CALL_URL || defaultUrl;
   }
 }
 
-export function getFreeCoachingCallUrl(): string|null {
+export function getContactSupportUrl(): string {
+  const defaultUrl = "https://www.getgrist.com/contact/";
   if(isClient()) {
     const gristConfig: GristLoadConfig = (window as any).gristConfig;
-    return gristConfig && gristConfig.freeCoachingCallUrl || null;
+    return gristConfig && gristConfig.contactSupportUrl || defaultUrl;
   } else {
-    return process.env.FREE_COACHING_CALL_URL || null;
+    return process.env.GRIST_CONTACT_SUPPORT_URL || defaultUrl;
   }
 }
 
diff --git a/app/server/lib/sendAppPage.ts b/app/server/lib/sendAppPage.ts
index 1647b4d4..c2a92680 100644
--- a/app/server/lib/sendAppPage.ts
+++ b/app/server/lib/sendAppPage.ts
@@ -1,4 +1,12 @@
-import {Features, getPageTitleSuffix, GristLoadConfig, IFeature} from 'app/common/gristUrls';
+import {
+  Features,
+  getContactSupportUrl,
+  getFreeCoachingCallUrl,
+  getHelpCenterUrl,
+  getPageTitleSuffix,
+  GristLoadConfig,
+  IFeature
+} from 'app/common/gristUrls';
 import {isAffirmative} from 'app/common/gutil';
 import {getTagManagerSnippet} from 'app/common/tagManager';
 import {Document} from 'app/common/UserAPI';
@@ -53,8 +61,9 @@ export function makeGristConfig(options: MakeGristConfigOptions): GristLoadConfi
     org: process.env.GRIST_SINGLE_ORG || (mreq && mreq.org),
     baseDomain,
     singleOrg: process.env.GRIST_SINGLE_ORG,
-    helpCenterUrl: process.env.GRIST_HELP_CENTER || "https://support.getgrist.com",
-    freeCoachingCallUrl: process.env.FREE_COACHING_CALL_URL || "https://calendly.com/grist-team/grist-free-coaching-call",
+    helpCenterUrl: getHelpCenterUrl(),
+    freeCoachingCallUrl: getFreeCoachingCallUrl(),
+    contactSupportUrl: getContactSupportUrl(),
     pathOnly,
     supportAnon: shouldSupportAnon(),
     enableAnonPlayground: isAffirmative(process.env.GRIST_ANON_PLAYGROUND ?? true),